Description. 4140 Chrome Moly. Includes fully assembled, head-spaced and test fired upper receiver, lower parts kit and buttstock. 15" Rail Black *Actual rail may vary from what is pictured* Micro Gas Block. Threaded Muzzle. 556 BCG. Notice how the government profile starts narrow swells out for the gas block, and then remains heavier out to the muzzle. The lightweight profile starts narrow, swells to the gas block, and then narrows out again. This is actually a hybrid solution, where the diameter at the gas block is the same between both barrels. Government Profile. This 20" barrel is no exception. This article contains affiliate links. Forums Member List Calendar Active Threads: Previous Thread: Next Thread : Print Thread: Hop To : Page 2 of 2 : 1: 2: Re: Primary Use for Government Profile Barrel? Buy Colt 20" Government Profile Barrel, AR15 M16 A2 A4: GunBroker is the largest seller of Rifle Barrels Rifle Parts Gun Parts All: 879650744 20 1:7 twist chrome lined government profile barrel complete with standard height front sight base hand guard end cap and barrel nut..made of 4150 Vanadium steel.Chrome lined chamber and bore.1:7 twist.5.56 Chamber.M-4 feed ramps.Standard height front sight base For use With A2 integral carry handle uppers.Made in the USA. Rifle and Handgun Barrels| Shop Now & Save - AR-15 - 8.5 - 20 - 24 - Heavy Barrel - Government - Mid Weight I don't know why the rumor persists that 55gr bullets won't shoot at all accurately out of a fast twist barrel. Quib. A2 Style 20 Inch Government Profile Barrel This government profile barrel provides excellent velocity for 5.56 rounds, with a full 20 inch barrel and a 1:7 twist rate. 4140 Chrome Moly. Madbull. Government profile barrels that are significantly shorter than the 20 barrel required the addition of cutouts on the barrel forward of the front sight base to be able to attach an M203 grenade launcher. 20". View All Close. HPT / MP Inspected Barrels . Search results for: '20" government profile barrel' Search results for: '20" government profile barrel' View as Grid List. Please view details for more information. Shop for 5.56 NATO and .223 Wylde AR15 Barrels at Aero Precision. Toll-Free: +1-800-504-5897 Live Chat Help Center Check Order Status are still putting government profile barrels on their guns. Ballistic Advantage 5.56 20 Barrel Government Profile. Ballistic Advantage 16 inch 5.56 NATO Government Profile Midlength AR-15 Barrel, Modern Series . 20" Govt. Colt 604 M16 Upper Assembly, 20" Government Profile Barrel, Bolt Assembly, A1 Birdcage, 1/7 Twist 5.56x45 NATO *Very Good* Be the first to review this product . BCM Bolt Carrier Group: None BCM Bolt Carrier Group (MPI) (Auto) + $189.00. Barrel: Chrome Moly Vanadium; M4 Feed Ramps. 20" Pre-Ban Flat Top Government Profile Complete Upper Assembly by DEL-TON This barrel assembly has a 20" barrel with Government profile, 1x9 twist, CAR handguards with single heat shields, and A2 Flash Hider. Super Shorties 5.5 to 7.5. Our Price: $115.00. This profile is the leading choice for competition or match-grade shooting. Set Ascending Direction. Quantity: Sorry we are currently sold out. I was doing some research on barrels and was a bit puzzled to find that so many top flight manufacturers (e.g., Daniel Defense, BCM, etc.) 1 Review . The downside is another tremendous loss of velocity from rifle rounds, and a tremendous increase in noise. 1:7 twist. 20-inch 5.56 Gov't Profile Barrel ; 20-inch .223 OCMP Barrels ; 20-inch 6.8 Rem SPC Heavy Barrel ; 20-inch 6.5 Sporter Heavy Barrel ; 20'' AR15 Standard Upper Half, Government Profile Barrel, 5.56 NATO, chrome lined chamber & bore, 1-7 twist, A2 flashider: $380.00 CHOOSE UPPER & REAR SIGHT Sort By. Quench Polish Quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. 20-inch 5.56 Gov't Profile Barrel ; 20-inch .223 OCMP Barrels ; 20-inch 6.8 Rem SPC Heavy Barrel ; 20-inch 6.5 Sporter Heavy Barrel ; 20'' AR15 Standard Upper Half, Government Profile Barrel, 5.56 NATO, chrome lined chamber & bore, 1-7 twist, A2 flashider: $380.00 CHOOSE UPPER & REAR SIGHT Colt factory replacement barrel, new with "C" MP stamp for older production Colt with Magnetic Particle Inspection. Add to Wish List Add to Compare. Denmark is participating in many high-profile international science and technology projects, including CERN, ITER, ESA, and was producing 259,980 barrels of crude oil a The Government Profile Barrel Is Dumb. Choice of "F" or non-F market FSB, Tapper pinnencludes barrel nut and Delta Ring. A2 Style 20 Inch Government Profile Barrel This government profile barrel provides excellent velocity for 5.56 rounds, with a full 20 inch barrel and a 1:7 twist rate. Sorry to derail the thread but the .750 diameter under the FSB is not what makes it a govt profile barrel. However, youre right in the sense that the A2 is what many or maybe some, refer to as THE govt. profile barrel. If you drill out the gas port a little it will run anything. M4 Feed Ramps. Material - 4150 Chrome Moly Vanadium. Rifle and Handgun Barrels| Shop Now & Save - 16 - 10.5 - 8.5 - 20 - Government The store will not work correctly in the case when cookies are disabled. Thomas Allen Coburn (March 14, 1948 March 28, 2020) was an American politician and physician who served as a United States Senator for Oklahoma from 2005, until his resignation in 2015. COLT-19228. FN Manufacturing 20 inch - Gov't Profile - Barrel - NO FRONT SIGHT $299.00 SKU: 2468 FN Manufacturing 20 Inch Government Profile ( A2 ) Hammer Forged barrel. - Buy AR15 Barrel, 18" BB M16 5.56 RIFLE online AR15 20" A2 Government Profile 4150 - 11595E Mil-Spec Barrel Steel. Precisely control blade speed up to 3,200 SPM with the variable speed trigger and Special Price: $159.19. COLT-19228. Includes fully assembled, head-spaced and test fired upper receiver, lower parts kit and buttstock. Barrel Style: Standard. Government A2 Profile. Taper Pins on F-Marked Front Sight Base. Shop for AR-15 barrels , AR-10 barrels , AR-9 barrels , barrels for Glocks , Sig P320 barrels , and many more, all available online at great prices. They are available in 20, 24 fluted and unfluted. Gas System Length: Rifle. The advantage to the Government profile barrel is that it can hold up better under sustained rates of fire and still maintain relatively good accuracy. Search results for: '20" government profile barrel' View as Grid List. Please view details for more information. Ballistic Advantage 20" 5.56 Government Rifle Length AR 15 Barrel, Modern Series - FSB w/ Delta Assembly. We currently have 1 Our Price: $155.00. Nitride Finish. If youre going to be conscious about barrel selection, they are also the most pointless. Items 1-12 of 1275. Our Price: $205.00. One of the greatest mysteries of the modern AR-15 is the so-called Government Profile Barrel. An AR15 with a SOCOM barrel is, of course, not as thin as a Pencil barrel and can take several rounds without significant heating and perform as expected with a bit of overall weight reduction. This barrel assembly has a 20" barrel with a Government profile, 1x9 twist, CAR handguards with single heat shields, and A2 Flash Hider. Warning! Barrels come in various lengths, gas systems, finishes, profiles, and flutes. Wilson Arms 20" Gov't Profile 223 Wylde 1x9 Stainless Steel w/ Tower. A2 Flash Hider. Examples of government profile barrels with the M203 cutouts include the Colt 14.5 M4 barrel and the Colt 16 6920 barrel. Barrel Profile: Government. Whether you want a 16-inch heavy profile barrel or a lightweight 20-inch barrel, Del-Ton has the barrels shooters want. 5. Barrel Profile: Government / SOCOM. Chamber: Made in USA. 20'' Del-Ton 5.56 Government Profile 1x9 Moly Stripped Barrel. The rifle-length gas system gives the shooter a slower, gentler push in recoil than carbine and midlength gas systems, too. Chrome Lined Chamber & Bore. Black Stock *Actual stock may vary due to supply line issues. A sterilization Coburn performed on a 20-year-old woman, Angela Plummer, in 1990, became what was called "the most incendiary issue" of his Senate campaign. The FAXON FIREARMS BIG GUNNER PROFILE 308 AR BARREL is a marriage of Faxons Government and Pencil profiles that gives balance of manageable weight and high accuracy potential. Upper Receiver. Includes the barrel extension (with M4 feed ramps), barrel nut, triangular front handguard cap, standard A2 front sight base with sling swivel, and bayonet lug. This is perfect as a replacement barrel, or for that service rifle build youve been planning. Government Profile. Barrel: Chrome Moly Vanadium M4 Feed Ramps 20" Length 1x9 Twist A2 Flash Hider Manganese Phosphated Phosphated under Front Sight Base Taper Pins If an A2 clone is in your future, look no farther than the Ballistic Advantage 20 government profile barrel. 4150 - 11595E Mil-Spec Barrel Steel. Rating: 93%. Our 16 5.56 barrel is the most accurate and longest lasting barrel attainable for your AR-15 build. We Cold Hammer Forge our barrels, a process that sets us apart from other barrel manufacturers. The 16 Government profile barrel is forged from 4150 Chrome Moly Vanadium steel, Mil-spec heavy phosphate coated and chrome lined with mid-length gas system. Madbull Daniel Defense 18" SPR Profile M4 Outer Barrel. Chambered for 5.56x45mm. The Colt AR-15 Barrel features a true 5.56x45mm NATO Chamber for use with both commercial and military surplus ammunition, while the 1 in 7" Twist Rifling is capable of stabilizing light to medium weight projectiles of up to about 77 grains. Reviews. Specifications: 5.56mm NATO Chamber & Bore. A lightweight 20" barrel with generally be .625" at the gas block. So, here is a quick demonstration of the two standard milsurp types out of a "Government profile" chrome lined 20" Colt barrel of not Regular Price: $198.99. This effort was also simplified by using the same barrel as the GA-1 20 mm autocannon (then made by Vektor, it is now a Denel product), which eliminated a major developmental obstacle. Shop for AR-15 barrels , AR-10 barrels , AR-9 barrels , barrels for Glocks , Sig P320 barrels , and many more, all available online at great prices. This "Pencil" profile Chrome lined barrel is the same size and finish as the original AR-15, XM16E1, M16 and M16A1 models. Barrel Length: 20 Inches Barrel Twist Rate: 1:9 Barrel Profile: .750" Diameter Heavy Barrel Hand-guards: Black Composite w/ Heat shield M4 Style Feed Ramps AR-15 Lower Receiver Parts Kit: AR-15 Complete Lower Receiver Parts Kit with Pistol Grip. For use in States with restrictions on flash hiders, we developed this 20 government profile barrel with a pinned & welded on A2 Birdcage type Muzzle Brake. CMMG Barrel and Bolt Group Kit, 20" GP 4140 CM SBN, 22 Long Rifle. I wanted to build a modernized fighting rifle instead of another carbine, and I knew this barrel would be a solid foundation. 0 Reviews. In stock. Barrel Length (inches) 20. 20" 1x9 Twist, Government Profile Chrome Moly Vanadium Barrel Chambered in 5.56 Nato Standard Length Gas System Comes with F-marked FSB, Barrel Nut, and Triangular Handguard Cap Does NOT include Front Sight Post, Detent, Spring or Front Swivel and Rivet Please note, signature required for delivery of this item. Barrels Barrels Del-Ton, Inc AR-15 AR15 20' pre-ban barrel Government Profile kit. Our Price: $175.00. 23 October 2010, 15:09 #2. It is sometimes known by the brand name of Tufftride, Tenifer Black Nitride, or All twist 1:7, 1:12, and 1:14 are being manufactured. At BCA we take the time to make quality gun barrels that don't sacrifice accuracy and performance but remain at a price point that doesn't break the bank. What does that mean? IT WILL ACCOMODATE BOTH .223 REM AND 5.56MM NATO AMMUNITION. Barrels are also available in .260 and .308 Winchester. Barrel has 5.56 Nato chamber, 1/7 twist rate, M4 barrel extension, rifle length gas system, threaded x 28 muzzle and Mil-Spec phosphate coated. Bull Barrel Profile. The Melonite finish inside and out makes the BA 20 government profile barrel corrosion resistant as well as easy to maintain. Weight 58 ounces. Nitride Finished. Shop CMMG, Inc 22LR Mk4 Barrel Kits w/ Bolt Group | Up to 11% Off 4.9 Star Rating on 41 Reviews for CMMG, Inc 22LR Mk4 Barrel Kits w/ Bolt Group Best Rated + Free Shipping over $49. The gas port on the 18 inch barrel is a bit small (just under 3/32") and so you need new parts and a clean rifle for it to cycle. Ballistic Advantage - 20" Barrel - .308 Winchester - Heavy Profile Rifle Length - Modern Series Barrel - 1:10 Twist - .750 Gas Block - BABL308006M MSRP: $250.00 | Your Price: $237.50 DSA AR15 20" A2 Government Profile 1:7 Twist Chrome Lined Barrel - With Sight Tower Specifications: 5.56mm NATO Chamber & Bore; Chrome Lined Chamber & Bore; 20" Length; 1:7 Twist Rate; Government A2 Profile; 4150 - 11595E Mil-Spec Barrel Steel; Rifle Length Gas System; Threaded 1/2x28; Barrel Extension w/ M4 Feed Ramps; Drilled Gas Port.750" Gas I will call in short word as 20 Inch Government Profile Barrel And Airsoft Repainting Mp5 For folks who are looking for 20 Inch Government Profile Barrel And Airsoft Posts: 17,383. Barrel Chamber: 5.56 NATO. Includes fully assembled, headspaced and test fired upper receiver, lower parts kit and buttstock. Mil Spec Buffer Kit. OKANOGAN Northwest Barrel Horse Associations first event of the season was May 7 at the Okanogan County Fairgrounds, with riders competing for points and pay. Threaded, 1/2-28 thread, with barrel nut, handguard cap and front sight housing with bayonet lug, Barrel diameter .750 at front sight base. At BCA we take the time to make quality gun barrels that don't sacrifice accuracy and performance but remain at a price point that doesn't break the bank. * THE .223 WYLDE CHAMBER WAS DESIGNED AS A MATCH CHAMBERING FOR SEMI-AUTOMATIC RIFLES. Twist Rate: 1:7. 20'' Del-Ton 5.56 Government Profile 1x9 Moly Stripped Barrel. I'm completely pleased with how it performs. In stock Purchase Now View Details . Add to Cart. This 20" barrel features a government contour, a 5.56 Nato caliber chamber, a 1:7" twist rate, a 1/2 x 28" TPI threaded muzzle, rifle-length gas ports, a .750" gas block profile and weighs in at 35oz. AR-10 6.5 Creedmoor 20" Stainless Straight Fluted Heavy Barrel - Rifle Length Gas System - 1:8 Twist. AR-15 Barrels for Sale at Joe Bob Outfitters! Something is appealing and nostalgic about the classic M16A2, especially to us DD214-holders dating back more than a couple of decades. Rimfire Ammo; Shotshell Buckshot Ammo; Shotshell Lead Ammo; Shotshell Steel Ammo; Shotshell Non-Toxic Ammo; Shotshell Slug Ammo; Black Powder; Blank Rounds SKU. The Del-Ton RKT106 Government Profile Rifle Kit 5.56x45mm 20 Inch Barrel Black. Choose a lightweight 20-inch AR 15 barrel with chrome lining for your next build, or AR 15 20 barrels in government profile with or without an included front sight base. Items 13-24 of 1272. 20" Length. The best research I can find on why such a thing exists shows the idea to be extremely dumb. Choose from barrel lengths from 11.5 inches through 20 inches and anything you might desire in between. Profile Barrel, a1 birdcage flash hider, triangle handguards, Colt bolt carrier assembly, 1/7 twist, 5.56X45 NATO, in *Good* condition. Get free shipping on qualified Barrel Rain Barrels products or Buy Online Pick Up in Store today in the Outdoors Department. Your Price $53.00. Gas Block Journal.750. Click to shop AR 15 Books. SKU. 11.5" 5.56 Government Profile Carbine Length AR Pistols can have any length barrel, though most commonly they will have shorter barrels ranging from 3 to 12 inches. The story of the government profile barrel is about trying to solve a problem that didnt actually exist. As youll see in the paragraphs that follow, the engineers thought they knew the problem, and applied a solution. By the time they realized that the problem was something entirely different, it was already too late. 20'' 223 Wylde Gov't Profile 1x7 Nitride Barrel w/ Tower. Buy Colt AR15 AR 15 5.56 20" Government Profile Barrel New: GunBroker is the largest seller of AR15 Parts Gun Parts All: 934928736 A govt profile barrel is defined by the contour under the handguards which tapers from .675" after the chamber to .625", where the handguard cap shoulder starts. Customers Also Viewed; Customers Also Viewed. Barrels Barrels Del-Ton, Inc AR-15 AR15 20' pre-ban barrel Government Profile kit. Quantity: Sorry we are currently sold out. So, Quib, I'm not sure whether I want a Government Profile or a Lightweight. The Del-Ton 20 Government Profile Rifle Kit comes with everything needed to complete a stripped lower receiver. Just purchase a magazine and you are ready to go. Profile Barrel, a1 birdcage flash hider, triangle handguards, Colt bolt carrier assembly, 1/7 twist, 5.56X45 NATO, in *Good* condition. AR-15 7.5" 9mm Barrel. CMMG Barrel and Bolt Group Kit, 20" GP 4140 CM SBN, 22 Long Rifle. Profile - Government. Features and Specifications: Manufacturer Number: 22BA6B6. Windham Weaponry 20" A2 gov't profile barrel. Hard coat anodized. 20" government profile rifle kit comes with everything needed to complete a stripped lower receiver. 20in. 4150 Chrome Moly Vanadium 11595E steel, chrome lined, chambered in 5.56, 1/7 twist, rifle length gas system, 1/2" x 28 muzzle thread, black manganese phosphate finish. 1x9 Twist. Joined: Sep 2001. Product Overview. 20" Length. Colt 604 M16 Upper Assembly, 20" Government Profile Barrel, Bolt Assembly, A1 Birdcage, 1/7 Twist 5.56x45 NATO *Very Good* Be the first to review this product . Government Profile. Our Price: $115.00. A Government Profile barrel has a .750" gas block area just as the heavy barrel. An SBR is a rifle with a barrel less than 16 inches or a rifle with a barrel of 16 inches or longer but an overall length of fewer than 26 inches. This Modern Series 20 Government Barrel is configured with a rifle length gas system, and includes a sub MOA accuracy guarantee from BA. Global benchmark Brent is currently trading near $105 a barrel. Length - 20". Just purchase a magazine and you are ready to go. This barrel diameter starts at .675 by the chamber and then tapers down to .625 under the handguard. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! 5.56 Nato. Reviews. 20" 5.56 Nato Government Profile Barrel - Nitride Finish. Phosphated under Front Sight Base. 3. Passive retention is adjustable, so you can dial in the retention and draw profile to your desired setting. The M4 barrel profile and A2 aka Government profile are the most common. O ne of the greatest mysteries of the modern AR-15 is the so-called Government Profile Barrel. This article contains affiliate links. What does that mean? This barrel diameter starts at .675 by the chamber and then tapers down to .625 under the handguard. Manganese Phosphated. Reviews. The retention shell is canted, so that this chest gun holster has a natural draw angle. ### From the manufacturer Del-ton Government Profile Rifle Kit Twenty inch chrome moly vanadium barrel, M4 feed ramps, 1:9 inch twist, A2 flash hider, manganese phosphated, phosphated under front sight base, taper pins in F-marked front sight base, threaded muzzle. Description. Buy, Sell, and Trade your Firearms and Gear. Everything you need to convert your existing upper to a dedicated .22LR. 1:7 Twist Rate. The M4/A2 profile are the same, save for a cutout in the M4 barrel for mounting an M203 grenade launcher. A2 Flash Hider. Length - 20" Material - 4150 Chrome Moly Vanadium Profile - Government Finish - QPQ Corrosion Resistant Gas System Length - Rifle Gas Block Journal - .750" Twist Rate - 1:7 inches Muzzle - 1/2x28 Threaded Weight - 35oz $165.00. The government profile barrel is also compatible with the current M203 mounting systems. In stock. A Republican, he previously served as a United States Representative . Features and Specifications: Manufacturer Number: 22BA6B6. 20". High quality American made parts with free shipping over $99. Shop our AR Complete Uppers and choose your barrel and additional add-ons only on BalisticAdvantage.com! Details: Government profile 20" chrome moly vanadium barrel with 1:9 twist, threaded muzzle and A2 flash hider. Shop AR-15, AR-10, AR-9, and handgun barrels manufactured by Bear Creek Arsenal! Rifle kit does not include stripped lower receiver, rear sight or magazines. The rifle-length gas system gives the shooter a slower, gentler push in recoil than carbine and midlength gas systems, too. Del-Ton 20-inch AR barrels are manufactured from chrome moly vanadium, feature 1 in 9 twist rifling and fit standard-length gas systems. Standard Charging Handle. Rifle Gas Tube. DSA AR15 20" A2 Government Profile 1:7 Twist Chrome Lined Stripped Barrel. CrazyCoot #17163485 04/14/22. BCM Charging Handle: None Mod 3x3 Ambi Handle + $56.95 Mod 4x4 Ambi Handle + $56.95 Mod 3B Handle + Jackpot 4D 20 Inch Standard Our 20-Volt MAX XR Cordless Barrel Grip Jigsaw features an efficient motor for powerful performance and extreme runtime. The country's first social democratic government took office in 1924. At the pistol level, these can be an excellent short barrel for sub-gun sized AR-15s. Profile: Government Tactical Part #: BABL556026M Caliber: 5.56 NATO To demonstrate a variety of options, we obtained four identical standard 16-inch mid-length gas system barrels with government profiles (and 0.750-inch gas block) from Bravo Company USA. Barrel: Chrome Moly Vanadium. Everything you need to convert your existing upper to a dedicated .22LR. Where is a good place to buy a 20" Govt Profile barrel that doesn't cost an arm and a leg? These super-short barrels make your rifle as small and compact as it can be. Comments about FN Barrel AR-15 5.56x45mm 20" Government Contour Rifle Length Gas Port 1 in 7" Twist Chrome Lined Chrome Moly Matte. The trigger is about 4-4.5 lbs, JP springs, with pre-travel adjusted/ creep minimized. [WTB] 20 Government profile barrel / M16A4 barrel [FL] Close. Barrels come in various lengths, gas systems, finishes, profiles, and flutes. M16A2 Rifle Barrel Assembly - for C7 / M16A2 builds. 20" Govt. The Del-Ton 20 Government Profile Rifle Kit comes with everything needed to complete a stripped lower receiver. Rifle kit does not include stripped lower receiver or magazines. 20 1:8 twist chrome lined government profile barrel complete with standard height front sight base hand guard end cap and barrel nut..made of 4150 Vanadium steel.Chrome lined chamber and bore.1:8 twist.5.56 Chamber.M-4 feed ramps.Standard height front sight base For use With A2 integral carry handle uppers.Made in the USA. Whatever length youre looking to build, there are AR 15 5.56 barrels ready for your project. Pistols, on the other hand, are firearms designed to be gripped by one hand. Yes 100yds, Del-Ton 20" government profile/rifle length gas, 1:9 twist. Mil.-spec forged 7075 T6 aluminum upper receiver with A3 flat top, M4 feed ramps, right hand eject with ejection port cover, round forward assist. What more could you ask for from a barrel with this much value? 1/2" Crush Washer. Sorry we are currently sold out. Drop this assembly on your upper, install the included Gas Tube, add your handguards and you are good to go. Home Forums Hunting & Shooting AR and Tactical Rifles Primary Use for Government Profile Barrel? Jerry Miculek comp. Filter By 10.5" 5.56 Government Profile Carbine Length AR 15 Barrel, Modern Series Rating: 100%. 1x Madbull Daniel Defense 20" Government Profile Outer Barrel; View All Close. Just recently, a fellow at work was all concerned that his proposed build might suffer if he gets a "too fast" twist barrel. AR-15 Barrels for Sale at Joe Bob Outfitters! The government profile barrel is also compatible with the current M203 mounting systems. Lower Parts Kit. This, I guess, by that definition, makes the A2 barrel THE true govt. This 5.56 chambered 20 inch Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel and comes with a pinned Front Sight Base and Delta Ring Assembly Kit. 20' Government Profile Barrel, 5.56 NATO, chrome lined chamber & bore, 1-7 twist, threaded muzzle 1/2 x 28 thread: $245.00 Rifle kit does not include stripped lower receiver or magazines. This 5.56 chambered 20" Gov Profile Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. Colt 20" government profile stripped barrel 1:7 5.56 NATO chambered M16A4 replacement chrome-lined phosphated 4150 CMV steel with 0.75" journal, "C" stamped - New Old Stock. Just before the gas block, it widens again to around .75 through the rest of the barrel. This 5.56 chambered 20 inch Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. Related search terms Barrels+for+ar barrel+brake+in barrel+for+ar barrel+bead+in barrel+for+ar+450bushmaster. This 20" barrel features a government contour, a 5.56 Nato caliber chamber, a 1:7" twist rate, a 1/2 x 28" TPI threaded muzzle, rifle-length gas ports, a .750" gas block profile and weighs in at 35oz. profile. Raymond H. LaHood (born December 6, 1945) is an American politician who served as the 16th United States Secretary of Transportation from 2009 to 2013 under President Barack Obama.A member of the Republican Party, he previously served in the Illinois House of Representatives (19821983) and United States House of Representatives (19952009).. His son Darin