The logical approach to small arms designed around an intermediate calibre general-purpose cartridge, given the stated need by PEO soldier for a rifle to engage the enemy at "8 to 800 metres", is to use a bullpup rifle with a 20 inch barrel. 260 Remington and 6. Match load's trajectory ("bullet path") -- first into Minutes of Angle elevation, and then, into target knob settings for knobs having either 1/4 Minute-of-Angle per click, or 1/8 Minute-of-Angle per click. 62mm Trajectory Data within the Ammunition forums, part of the M14 M1A Forum category; Can you someone post the Trajectory Data of M80 Ball and M59 Ball 7. Hornady's 126-grain Custom Lite load for the. We stand behind our commitment to performance. 308, ballistics, Black Hills Ammunition, Elevation and windage, Jeff Hoffman, Law Enforcement Sniper, Long Range Sniping, Wind effect on. I have a highly modified DPMS LR-308 with an 18. Another factor that enables the. 5 Grendel bull barrel upper (actually manufactured by Mossberg). One of the most well-balanced and versatile. 308 at distances out to 350 yards. 62x51 NATO bolt-action rifles from a variety of manufacturers. 30-06 share many common traits. When we cut our 6mmBR barrel down from 33″ to 28″, we only lost about 8 FPS per inch. Ballistics question. 357 magnum is. Thank you for participating in our “Member Tested and Recommended Products Program. One of the groups that I follow on Facebook ( don't remember which one) has done this with various calibers from the. 308 Winchester cartridge with bullets of equal weight. 38 Special tests, we used a 2-inch Kimber K6s to fire five rounds into a Clear Ballistics gelatin block with a heavy clothing barrier. 5 Grendel from Alexander Arms is unbeatable. Ballistics by the Inch (often called BBTI) is an ongoing project to test the performance characteristics of a variety of common handgun calibers/cartridges. bullet demonstrates similar penetration to the 223 Rem 75 gr. 308 rifles I currently own, and others that I have owned in the past. 2,825 fps - Kimber 84 Montana, 22-inch barrel. Complete 300 AAC Blackout ammunition ballistics Chart. 10gr variation in a box of any of my bullets. Thank you for participating in our “Member Tested and Recommended Products Program. I post all this because the important thing to remember is that the. 308 Winchester Rifle Cartridge by Nosler Inc. If you want light, this is it. 308 rifles for deer hunting. 308 Winchester barrels from Ballistic Advantage are a good choice. 5 Gr 100 Per Box Target Bullet Line Is Made Up Of The Many Legendary Bullets That Have Been Winning Matches And Setting Records For decades. This is a discussion on M1A 168 Gr Ballistics Question within the Ammunition forums, part of the M14 M1A Forum category; I have a standard Springfield M1A rifle and generally shoot the L2A2 147 Grain NATO. 625 BC) loads in 6. 5x38 Grendel cartridge has a. **ALL BARRELS ARE ON SALE - Please view the barrel section HERE for the most up to date coupon code available!** This. One of the groups that I follow on Facebook ( don't remember which one) has done this with various calibers from the. Since the AR-15 is more compact and lighter in weight, an AR-15 in 6. The rifle I tested was a combination of all three variants offered by Aero Precision. Furthermore, “a. 62x51mm NATO cartridge are not identical to the commercial. This is typical of a match or sniper load shot from one of the popular. Note: For an expanded version of this table showing more loads, including British, European, wildcat, obsolescent American and proprietary calibers, see the Expanded Rifle Trajectory Table. At 300 yards groups spread to 2. Optimum sight setting for a 6 inch vital zone for this ammo and your firearm is as follows: Shoot! ballistics software calculated the following sight settings: "2. See our Custom Calculation Order Form. I am gearing up to make my return to YouTube. I prefer 18-20" barrels on any short rifle cartridge. What All M1A™'s Have In Common. 625 BC) loads in 6. The Urban Counter-Sniper is a compact. 300 Rem SA Ultra Mag. 308 AR15 - Can I Shoot 308 in an AR15? 308 AR15 - When speaking with or listening to less experienced shooters I often hear the expressions 308 AR15 or AR 15 in 308. Barnes also makes a 110 gr 308 bullet just for SBR's that can be pushed to near 5. Reloading the. It turns out that zeroing a. 196 Ballistic Coefficient. bullet demonstrates similar penetration to the 223 Rem 75 gr. The range of vision is from 11. kak industry 308 win stainless barrel 34. Another factor that enables the. I am not here to listen to. One of the groups that I follow on Facebook ( don't remember which one) has done this with various calibers from the. Real ballistics out of real weapons. Conclusion When looking at the. 62x51mm NATO: Barrel Length versus Velocity (28″ to 16. We go through an exercise comparing the winchester 22 wmr ballistics with the 22 wmr hornady ballistics and 22 wmr cci ballistics. 3 grains, with the heaviest case weighing 1. It may be comparable to a 24 inch barrel with a 1 in 11 twist. It gets 2500 fps from a 180 grain Hornandy BTSP. 62 NATO are popular calibers among tactical shooters, but what's the difference between the two? Which ones can be safely shot in what guns? Find out the details here. more energy than either the 130 grain or 150 grain bullets at that range. 308 Win even if it is only around an inch of difference on average. None of these are so great as to be determining factors in which one a hunter chooses. Ballistic Advantage. On the surface,. The one worth waiting for is from ATK. But be ready for the added expenses to…everything. These scopes may not be for everyone as some of them carry a higher price tag. 30-06 Sprg. Precision machined from 4150 Chrome-Moly vanadium steel, this is a heavy profile barrel designed for both custom builds and upgrades of current rifles. The power shock tip is nice , pointy , and fairly smooth compared to some other brands I have seen. This is a discussion on The. 62 NATO field as well, and because of their new partnership, Ballistic Advantage will be applying their AR-15 skills to big-bore barrels. Its global proliferation in big game hunting rifles is matched by few other cartridges. EBR has 308 Subsonic ammo including. 8 SPC cartridge is one of those happy "accidents" whose performance potential is all out of proportion to its design--like the old DC-3 aircraft or the 1911 pistol. 223 cal) is designed to produce larger wounds with high velocity, lower mass bullets that tumble, cavitate, and release energy quickly upon striking the target. 5" carbine length barrel is the perfect addition to your. 308 Winchester cartridge. Bullet Resistant Charts for UL752 and NIJ. 308 24" Rifle Stainless Steel 1:11 Poly Barrel - DPMS Compatible Black Hole Weaponry Barrels employ the use of 416R, match grade stainless steel. 308 bullets meet the spec. 5 creedmore than either. 308 Winchester are both very popular options. So with $300 burning a hole in your pocket for new glass for that new rifle, you know that you want to step up from the sub $200 offerings. I test out their AR-10 in. Click on a term to search for related topics. That is plenty to get out to ethical hunting distances. 5 Creedmoor are typically about identical. 308 velocity to about. 62mm Trajectory Data. Optimum sight setting for a 6 inch vital zone for this ammo and your firearm is as follows: Shoot! ballistics software calculated the following sight settings: “2. 6 in, with a tube of 1 inch in diameter and 44 mm in the outside. When I get around to a 308 gas gun 16" is what I will be. 308 rounds at the 400-500 yard mark, there is some middle ground where. Ballistics of. Trying to narrow down the list of. 62x51 NATO Ammunition is perfect for any shooter, and affordable too!. 300 Weatherby Magnum exits the muzzle of a 26-inch barrel about 1 1/4 milliseconds after it starts to move. You can figure 25-50 FPS loss per inch of barrel. 357 magnum is. 308 to get some good trajectory estimates. Select Radical 16 inch Rifle Kits ; Ballistic Advantage Modern Series 16". by Layne Simpson all have flat-nose profiles and are currently available in 0. 308 Winchester caliber. The Ultimate Rifle Tip: Real Time Zeroing with Ryan Cleckner | Long-range Shooting - Duration: 22:16. I am not here to listen to. We Investigate 5 Top Options The 308 bolt-action rifle has been enjoyed by hunters and sport shooters for over 60 years, and the title of best 308 rifle has changed constantly over the years. 300 AAC Blackout is the winner inside of 100 yards. Looking through the Oehler Ballistic Explorer Ammo Library, the 150 grain factory loads seem to center around a B. These things are what sets Precision Ballistics LLC apart from all the rest! The variation for all bullets within a box does not exceed +. 223 Remington. 62x51 NATO bolt-action rifles from a variety of manufacturers. 410 (4 Disc/16 BB) shotshell, and the 2½-inch. 4 grains more, and the lightest two 0. 5 Creedmoor are typically about identical. 308 or the 30. Manufactured to Nosler's strict quality standards, Nosler® ammunition is built to attain optimum performance, no matter what you use it for. All three 77gr Black Hills long range precision loads gave me the identical 100 yards accuracy of average 0. 300 AAC Blackout is the winner inside of 100 yards. As for trimming the barrel to 20 inches, whatever the difference amounts to in the 308 it will not be significant and the difference in external ballistics will not be noticed in the field IMO. 56x45mm NATO -. 30 Carbine (7. 5” with a third round tripling the size of the group. Ballistics 5. Crafted to mil-spec standards from 4150 Chrome Moly Vanadium with a QPQ corrosion resistant finish, this barrel provides time tested precision and accuracy. 260 Remington and 6. Choose the lowest price from multiple warehouses. Anyone who is serious about shooting knows that your choice of ammunition is important. 308 Winchester remains the standard sniper anti personal cartridge of the military due to the heavy support structure that surrounds it. 0025 inch overlap between the 7. 18" Barrel Weight: 48. Shooting at 1000 yards is one of those things that can be done, but with some difficulty with a. While a medium velocity round at about 2700FPS for the 140 grain it still retains 18% more energy at 1,000 yards than the heavier 175 Grain. 10 shots were recorded for each silencer and the peaks of each shot were averaged to come up with the suppressed sound level as well as the net sound reduction. Our products are continuously tested for Sako’s high standards on accuracy, performance, stopping power and reliability. Barnes also makes a 110 gr 308 bullet just for SBR's that can be pushed to near 5. 260 Rem has slightly (1. Engel Ballistic Research provides subsonic, polymer cased, and frangible ammo. From ammo to scopes to rifle…you’re going to be paying a lot more than AR-15 prices. NTX® 83176 2050 1450 1070 —145 72 39 -1 5 0 -156. Cat: Type: Usage: Federal Load No: Caliber: Bullet Weight in Grains: Bullet Weight in Gram: Point: Bullet Style: Primer No: Premium: High Energy: Large, Heavy Game. Army to replace the 30-06, the. Step Two: Converting Ballistic Data into Target Knob Settings In the table below I've converted the. At 100 yards it will print a 3 round. 308 field reject headspace. 223 round fired from a carbine, but of course the. You might know this. 308 load at 1000 yards, the difference in point of impact is about 20 inches. bthp within the Ruger Bolt Action forums, part of the Rifle & Shotgun Forum category; Hey guys, Just joined last night and already have found so much useful information. 2 inch drop The 7mm-08 is clearly better, and I hope more ammo makers like Nosler will put out more and more ammo for it. They both use bullets of identical. Furthermore, “a. For long range I have a Win. Manufactured to Nosler's strict quality standards, Nosler® ammunition is built to attain optimum performance, no matter what you use it for. Click on a term to search for related topics. 4 inches less drop on 7mm-03, a whopping 32 ft lb more energy for the 7mm-08 and a whopping 1 inch less drift for the 7mm-08. Choose the. " The 308 WIN 168 GR AMAX TAP has been tested and recommended by the members of the National Tactical Officers Association. 308 (Winchester) 168-grain BTHP Match round will impact 6 inches lower at 500 yards when fired from a 20 inch barrel than when fired from a 24 inch barrel” [6]. In fact the bullet drop and performance is about the same as for the. Frankly, if you are worried about velocity, don't be. 308 moa drop at 100-1000 yards ? How to calculate for drop? I need to learn how to calculate the MOA drop for a. 5s have been dominating long-range shooting, hunters still think of the. Much Different Results with 6mmBR and a Longer Barrel The results from Rifleshooter. I test out their AR-10 in. The 300 BO uses the same brass as the 223, but cut down about a half inch and necked to accommodate a. 5 Creedmoor to 150gr Nosler E-Tip (. The one worth waiting for is from ATK. 308 Ballistics Chart & Coefficient Article Posted: July 10, 2012 The following is a 1000 yard. By short barrel, I'm talking about 16 inch or less barrels. It should also be. A SBR'd 308 can definitely be effective, but you run into the same problems as any other SBR - possible reliability loss, reduced ballistics and effectiveness, massive increase in flash and blast, and requirement for better bullet selection to make sure you get good terminal effects from the reduced velocity. Crafted to mil-spec standards from 4150 Chrome Moly Vanadium with a QPQ corrosion resistant finish, this barrel provides time tested precision and accuracy. However, the result is a decrease in bullet velocity from short-barreled rifles, such as the autoloading Colt LE901 with a 16- inch barrel, Ruger Compact with a 16. 56 use for sniping. It penetrated to just about 22 inches and retained everything except the ballistic tip. Besides, the. As the leader in the field, we manufacture the best and most reliable weapons. 308 is by far the most popular sniping round, and for good reason. I've heard alot of 308 guys say that shorter barrels are more accurate than long barrels. 62x51mm NATO. These bullets have a hollow point boat tail design that gives an excellent combination of accuracy and terminal ballistics. “What about Shotguns and Shotgun Ballistics? The entire Ballistics Series was great and it was the first time that the science behind shooting was explained in a way that made sense. 5″ barrel:. This rifle is scary accurate out to 500 yard, which is as far as I have access to shoot. 308 diameter bullets used in the. — If you are willing to have a 16-inch (or longer) barrel and softpoint bullets, then 5. Precision machined from 4150 Chrome-Moly vanadium steel, this is a heavy profile barrel designed for both custom builds and upgrades of current rifles. Frames from motion picture of 1 / 8-inch steel sphere entering gelatin gel 56. However, the result is a decrease in bullet velocity from short-barreled rifles, such as the autoloading Colt LE901 with a 16- inch barrel, Ruger Compact with a 16. 380 ACP was designed to be truly rimless, with headspace on the case mouth instead of the rim for better accuracy. Shooting at 1000 yards is one of those things that can be done, but with some difficulty with a. Why does everyone recommend an 18 inch barrel instead of 16? Here's my go-to write up on 308 barrel length vs. But you shouldn't be a bit surprised to find guns chambered in the U. 7 inch groups out of both of my testing rifles with 18-inch barrel. 260 Rem retains the same shoulder profile and its resultant longer case length. The vision is in color and adapts to any place. A B&L 6-24X scope was installed in Sako mounts. I can almost assembling an AR with the lowest weight and best balance possible for some reason, but these heavy barrel guns border on dumb, no matter how well they shoot off a rest. It turns out that zeroing a. 62 NATO field as well, and because of their new partnership, Ballistic Advantage will be applying their AR-15 skills to big-bore barrels. Columbia, MO - -(Ammoland. 308 chambered 20 inch barrel is machined from 416R Stainless Steel with a bead blasted finish. The 30 06 Vs 308 ballistics are practically the same within hunting range. 308 Premium AR Barrels, Barrel Parts & Accessories: Enjoy free shipping and the lowest prices on quality AR15 and AR10 and. 308 semi-automatic rifle ? If so, you’ll be glad to hear that there are several high quality choices for you available on the marketplace, which each offer excellent performance, accuracy, durability, and reliability. 49 inch 149 grains; Maybe a better way is to watch the video of the bullets impacting the 10% ordnance gelatin. 4 and a muzzle velocity of 2800 fps, which when dead on at 200 yards are about 1. You say your using mag primers? 308 winchester uses large rifle not mag primers and mag primers won't fit in to the primer pocket. 308 Win Ammo is both in-stock and ships immediately. 7, rounded = 5. 308 Win Hornady 150gr. Step Two: Converting Ballistic Data into Target Knob Settings In the table below I've converted the. There are some other ways to squeeze more zonk out of the old zombie. 300 Blackout is essentially a. 8 SPC cartridge is one of those happy "accidents" whose performance potential is all out of proportion to its design--like the old DC-3 aircraft or the 1911 pistol. In this video, I compare my experiences and share my thoughts on the 6. 5gr of RE-15, Lapua cases and fed gold match primers. Optimum sight setting for a 6 inch vital zone for this ammo and your firearm is as follows: Shoot! ballistics software calculated the following sight settings: “2. The trend is toward shorter barrels for rifles chambered for the. 5" Ballistic CMV Barrel, Carbine Length. It's lighter, handier, recoils less, uses common AR-15 parts, and the ammo weighs less. The Federal shot the tightest groups at 100 yards. It has the fast 1 in 10 twist apparently. 5 does offer a bit better resistance to wind drift. 4 and a muzzle velocity of 2800 fps, which when dead on at 200 yards are about 1. 5mm Grendel is an interesting alternative to the AR-10/LR308 type platforms. 308 Winchester to increase carrying ease and maneuverability. With a typical. 308 Win, Browning BLR with a 20" barrel. 300 Winchester Magnum (7. 243 (relative to the drag function G7, in ICAO standard atmospheric conditions). However, the result is a decrease in bullet velocity from short-barreled rifles, such as the autoloading Colt LE901 with a 16- inch barrel, Ruger Compact with a 16. This piston-driven. The M118 would group into 3/4" at 100, but seemed even better at 500 and 600 yards, probably due to a better ability to buck the wind. 308 Winchester (7. For hunting the bullet is the imortant choice. The data relative to the bullet, i. Thus, the velocity differences are mostly appreciated by the long range precision shooter. 308 only requires 15. While there is a significant difference between several of the. In the market for a new barrel for your AR-10 rifle? Look no further than this 18". com)- What happens when you get a physicist. Ballistics By The Inch. The test platform is the Barnes Precision CQB rifle reviewed here. This is a discussion on M80 Ball and M59 Ball 7. Depending on the load. What length do you guys recommend? Will the 22 inch barrel effect my guns accuracy? And also will the change in fps from 24 to 22 inches change the ballistics a lot? Most ammo companies test out of a 24 inch barrel and I can't find a lot of 22 inch barrel ballistics info. **ALL BARRELS ARE ON SALE - Please view the barrel section HERE for the most up to date coupon code available!** This. I can almost assembling an AR with the lowest weight and best balance possible for some reason, but these heavy barrel guns border on dumb, no matter how well they shoot off a rest. 531) shown for comparison. For example, Leupold M1 dials I have tested are closer to 1 inch per hundred yards than 1 MOA. 62x51mm NATO for Sale at Tombstone Tactical. Chambered for. Produces a ballistic trajectory chart and table that shows the drop, velocity, kinetic energy, windage, and trajectory of a bullet. 9%) more powder capacity. 308) will be least affected by a 20 inch barrel vs. 308 and barrel length. 531) shown for comparison. Select Radical 16 inch Rifle Kits ; Ballistic Advantage Modern Series 16". So with a bullet weight of 150 grains going from a velocity of 2800f/s to 2600 f/s you lose 360 ft-lb of energy. 308 Winchester (7. 260 Rem retains the same shoulder profile and its resultant longer case length. 308 AR at 50 yards works just as well. 5 Creedmoor: The Long-Range King. 5 CM is rated for a higher maximum pressure but. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. The Ideal Barrel for a. The key factors in calculating ballistics are bullet BC, bullet weight, muzzle velocity, and wind. The Nosler® ballistics team, long respected in the hunting and shooting industry for reliable and precise reloading data, is the driving force behind Nosler® ammunition, assuring Nosler's unsurpassed quality standards in accuracy and consistency in. At 100 yards it will print a 3 round. 56mm is the winner at all ranges. Ballistics by the Inch (often called BBTI) is an ongoing project to test the performance characteristics of a variety of common handgun calibers/cartridges. Considering these facts, IMO it's a substantial mistake to plan for 20-inch ballistics. Going down to a 12-inch barrel only loses another 83 fps, while a 10. 308 Winchester was introduced in 1952, two years prior to the NATO adoption of the 7. 61 inches high at 100 yards for a 230 yard zero. Chambered for. 85-inch-long case, it requires a magnum-length action and remains a popular choice among those who hunt open ground. 7X28mm Cartridge. Among the 6. 308 I know a minute of angle at 100 yards is 1 inch and 2 inches at 200 and so on but how to I calculate what the drop is for the. 300 Blackout is essentially a. Even though the difference is small, there is a trend towards the. 62 NATO field as well, and because of their new partnership, Ballistic Advantage will be applying their AR-15 skills to big-bore barrels. They all handle great in the field, and don't suffer from velocity loss as much as some would believe. If you are going to be hunting, then a 16-18 inch barrel will probably serve your needs best, since hunting shots with the Grendel will most likely be inside 400 yards, and from most hunting expericence, inside 200 yards. I have a Ruger 308 with an 18 inch barrel. The cartridges will be compared in terms of ballistics, price, weapons, and reloading ability, to highlight the differences between 6. The Oracle. 243 Winchester! This Ruger M77 in. Howdy, I would be interested in seeing someone take a 20" barrel and test the velocity by cutting off one inch at a time down to 6 or 7". A decent answer really requires load info: bullet weight, ballistic coefficient, muzzle velocity. Bolt-Action Thumper:. 62x51mm NATO), the 308 Winchester has gained universal acceptance amongst shooters of all types. 308 which I consider the Ideal patrol rifle for many situations. Crafted to mil-spec standards from 4150 Chrome Moly Vanadium with a QPQ corrosion resistant finish, this barrel provides time tested precision and accuracy. The rounds were fired through a Heavy Cloth * covering into 10% ballistic gelatin. i have a simmons 3-9x40 scope and had cabela's mount and bore sight it before i left the store. 5 has 769 ft. 308’s groups look bad as sheer size goes, but there’s more to the story: in each case, two of the three rounds landed within. 308 is by far the most popular sniping round, and for good reason. If your main intention for the weapon is self-defense or quick moving competition, then a 16-inch barrel is the way to go. 3 inches at 200 yards. org that accurately details all aspects of the bullets trajectory the millisecond it leaves the guns barrel. 30-06 have been increased over the GI specs, by a fair margin. The power shock tip is nice , pointy , and fairly smooth compared to some other brands I have seen. After introducing more than a hundred whitetails to my skinning knife, I've become a firm believer in the attributes of the. set zero at 345 yards. I really don't know if a 16 inch. I tell my students that the ballistic solvers we’ll discuss here are probably the greatest tools a long gunner could ever have. When it comes to hitting small targets waaay out there—think teacup five football fields away—the 6. It is a good hunting round and its performance is half way between the 308 and 7. and am going to be using it for deer hunting and coyote hunting. 308 Winchester is not only a historic battlefield caliber, it is an established match caliber and one of the best all-around North American hunting calibers. 308 Premium AR Barrels, Barrel Parts & Accessories: Enjoy free shipping and the lowest prices on quality AR15 and AR10 and. At Federal®, we not only build the industry's widest variety of ammunition, we offer the leading products for every facet of the shooting sports. Either way, I've found that a 24-25 inch barrel for me in my 308 seems to be a great compromise. 62x51 ammunition as they are essentially the same round. 30-06 Springfield share common traits, picking one over the other can be even more difficult. 300 Winchester Magnum (7. It is a little pricier than the other scopes on our list, but what you get for the money is a tough one to beat. 196 Ballistic Coefficient. We started off with a brand new Sako S 491 rifle with a 22-inch barrel. Proof Research AR10 Carbon Fiber Barrel 308 WIN 18" RIFLE GAS 10T PROOF Research AR Carbon Fiber Barrel - 308 WIN 18" RIFLE GAS 10-Twist PROOF AR10 CARBON FIBER BARREL Caliber/Cartridge. Rifle Upper Parts Barrels; Ballistic Advantage 12. I've heard alot of 308 guys say that shorter barrels are more accurate than long barrels. 308 Winchester VEPR rifles with both five- and 10-round magazines. On professional shooting ranges, the. READ RifleShooter. The cuts were made in one-inch intervals with a. 456, the SD is. 5 inches at a hundred yards shooting off the bench with sandbags. Short SOCOM-16 version at left is much handier, but shorter barrel reduces. Lightweight, accurate, and pretty good bang-for-the-buck…it's one of the barrels I wholeheartedly recommend in my Best AR-15 Barrels article. All AR-15 barrels Ballistic Advantage creates surpass the competition in accuracy, precision, and beautifully contoured aesthetics. 308 delivers maximum AR punch in a surprisingly compact frame. velocity fps 3400 3285 3174 2960 2756 2561 2368 2183 1506. I'll be honest, the 308 is pretty marginal at 1000 yards, and your choices are generally the 155gr Palma match with a stout load and a long barrel. We go through an exercise comparing the winchester 22 wmr ballistics with the 22 wmr hornady ballistics and 22 wmr cci ballistics. The projectile was mushroomed handsomely with its original. 61 inches high at 100 yards for a 230 yard zero. 308 chambered (DPMS style) 20 inch Heavy Profile Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish (Nitride) and QPQ coated M4 feed ramp extension.