$279.00 $239.00. The 10.5" Rosco Manufacturing Purebred .300 AAC Blackout Barrel has a gas block journal size of 0.750 and uses a pistol length gas system. Add to Wish List Add to Compare. Out of stock. We have found that the BLK 300 1-7 and 1-8 twist rate are the best. Filters . 9 inches is the perfect size to burn all the available powder in the 300 blackout cartridge allowing you to maximize your potential. The 300 Blackout (300 BLK) was designed by Remington/AAC to create a reliable, compact .30 caliber round for the AR platform that uses a standard bolt and magazine. Shop By . The BLK 300 is fashioned as a subsonic cartridge to complement and enhance the suppressor technology. AR-15 Barrels and AR-10 Barrels in a variety of lengths and twist rates. We ship via UPS/FEDEX. Length: 10.5". Specifications. Apr 23, 2022. SPECS SHOW MORE + So yes both the pistol length gas tube and low profile gas block from Aero Precision will work. Show. Faxon Firearms 8.3" .300 Blackout AR-15 Pistol Barrel View at Ballistic Advantage $176 A great maker of shorty .300 barrels that all clock in at under $200 smackers, Ballistic Advantage makes 6, 8, 8.3, 9, 10, and 10.5-inch 300 Blackout barrels with the company's Modern series being more of a budget line while their Hanson models are a tad better. First, I want to reiterate that the .300 AAC Blackout . AR-15 300 BLACKOUT CORE SERIES $ 289.99 ** BLEM ** AR-15 18 . 5/8"X24 Tread Pitch. A 1:7 or 1:8 twist rate works best with . RETAIL: $179.00. Twist: 1:5 twist for the 7 barrel, 1:6 twist for the 16 barrel. Noveske 300 Blackout Barrel - 16 w/ HS Bolt. The twist rate will work well for subsonic and supersonic loadings alike and . 14 Reviews. Available in 8.5" and 10.5" 1-7 Twist. If you'll be shooting mostly supersonic loads with lighter projectiles (80 to 125 grains), opt for a barrel with a 1:7 twist rate. View Details. Barrel is finished off with Multiport muzzle brake, designed to reduce muzzle rise and noise. Though these bullets are delivered at a lower velocity, the .300 Blackout's lower chamber pressure and fast-burning powder allow for shorter, lighter barrels ideal for close combat. The .300 Blackout works best with either a 1:7 or 1:8 twist rate. Carbine length with enhanced gas port hole diameter. Gas Block - .750 Diameter for Gas Block. Caliber- .300 Blackout Phosphate Barrel Twist-1-7 Fit-Standard AR-15 Receiver Muzzle Break - 5/8-24 Thread Weight- 16oz Gas Port Drilled 0.11" Pistol Length M4 Feed Ramp Made from Gun metal steel bar stock 4150 CMV Steel NON CHROME LINED MADE IN THE USA. Add to Wish List Add to Compare. The .300 Blackout carries a .30-caliber bullet that offers greater mass than a .223 Remington's .22-caliber projectile. In Stock. Let me see if I can dig it Quick Version: MV X 720/Twist Rate = RPM So a 125gr with a muzzle velocity of 2,220 fps would have a rotational speed of 319,680 rpm. And what is not to like about a high quality chrome lining. Add to Cart. notify me. Our 16" .300 Blackout Pistol Barrel is the perfect addition to your AR15 build. Ghost Vital 7.5" Upper .300 Blackout. Order today for great prices and unmatched quality! We'll help find the best barrel at the best price for your AR-15 or AR-10. Bear Creek Arsenal is a proud provider of a vast selection of firearms available to you online. $470.25. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when . View Details. View as Grid List. SALE PRICE: $146.35. Ballistic Advantage, Modern, Distinct Rigid Pattern, Barrel, 300 AAC Blackout, 8", 1:7 Twist Perfect For The Q Honey Badger or Sugar Weasel AR Clone! GMRB did all the hard work. Perrfect PDW engineered size for 300 AAC Blackout is 8". I have a feeling even 1:7 is just barely adequate to . You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. It was designed to burn in short barrels and anything more is really just excess weight. Personally I won't buy another 1/8 300 blk barrel as I am seeing more 1/7's lately, plus I shoot a LOT of suppressed subsonic. 300 Blackout. Crafted to mil-spec standards from 4150 Chrome Moly Vanadium with a QPQ corrosion resistant finish, this barrel provides time tested precision and accuracy for your AR15 .300 Blackout Pistol build. These 300 Blackout barrels from BA are 9 long with a 1:7 twist rate for proper stabilization. 1776 United shirts . The firearm may not lock back with subsonic 220 and 208 grain ammunition without a sound suppressor. Close to View Results Filter. Gas block and gas tube not included. The 10.5 300 Blackout 1-8 Med Pistol Gas System Barrel comes with a 10.5' barrel with a pistol gas system. The M-Lok free float rail does more than just add to the overall aesthetic appeal of this Trybe Defense barrel. $129.00. First, supersonic ammunition was tested unsuppressed through a custom AR-15 pistol with a Brownells 10.5-inch .300 Blackout barrel with a 1-in-8-inch twist rate. Lbe Unlimited Barrel, 300 Aac Blackout, 8.5" Barrel, 1:7 Twist, Fits Ar-15, Black Nitride Finish Arbar300-8Product Type: BarrelFinish/Color: Black NitrideFit: AR-15Caliber: 300 Blackout Out of stock LBE Unlimited 300 Blackout 1/8 Twist 10.5" Barrel Add to Cart. The Discreet Ballistics 300 AAC Blackout 188gr Selous Machined Expander is a subsonic hunting load that incorporates a machined copper 30 Cal projectile (the Selous bullet) which expands at subsonic velocities above 750 feet per second. However, I don't plan to use the rifle for subsonic suppressed. Rosco Manufacturing Purebred 300 Blackout AR-15 Barrel Heavy Pistol Length - 8.2". 300 BLK. The 10.5" 300 BLK upper includes:Barrel - 10.5" heavy cont.. Add to Cart. Rosco Manufacturing Purebred Heavy Profile 8.2" .300 BLK Shop Now 9" 300 BLACKOUT AR-15 1X8 FAXON FIREARMS MATCH SERIES 5R 416R PISTOL LENGTH BARREL - 15B38P9NGQ-5R-NP3. Machined a 9.5 inch barrel from this chambered blank, ended up with an amazing accurate shooting AR15 pistol. CLOSE. I've noticed some manufacturers have even faster twist rates like Q with the honey badger at 1:5 and Sig with the MCX at 1:6 (those were both designed by the former AAC employee responsible for 300BO). SuburbanHick. 7 Items . On other hand, if you are into shooting loads that are supersonic and light in weight, then a 1-7 twist rate is well-suited for you. "Nine inches of barrel will give you the perfect balance of light weight and velocity with the 300 BLK cartridge. Position Asc Position Desc Price High to Low Price Low to High Popularity Date Asc Date Desc Name Asc Name Desc. Visit Ghost Rifles and shop 7.5" 300 blackout 1:8 twist 416R stainless steel barrel now. Barrel Finish - Nitride. Menu (800) 308-4185 . 300 Blackout is optimized for suppressed fire with heavy bullet subsonic loads but can also be used with supersonic ammunition when extra range is needed. We make it easy for you to browse and select the perfect firearm for you at great prices. Item Number: RIFLE3080 Be the first to review this item: In Stock . No other modifications to your AR-15 is required. Barrel Rifling: 5R: Twist Rate: 1:7 inches: Thread Pitch: 5/8x24 . 300 BLK. Then get the Midwest Industrys 7.25" SP Free Float Handguard, Low profile .750 gas block Wison,Troy, or BCM, then Video showing 1:8 keyholing with subsonics. A3&nb.. Features. 4. Stag 15 16" Barrel in .300 Blackout with 1:7 Twist Rate - Pistol-Length - Nitride. Fit-Standard AR-15 Receiver. If you'll be shooting mostly supersonic loads with lighter projectiles (80 to 125 grains), opt for a barrel with a 1:7 twist rate. 300 Blackout is optimized for suppressed fire with . Show. When choosing between the 300 Blackout upper 1-8 or 1-7 twist rates, keep in mind that this barrel isn't initially designed for hunting. This .300 Blackout chambered 8 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. These barrels feature various contours and linings depending on the needs of the shooter. Huge Selection of AR-15 & AR-10 Rifles, Pistols, Uppers, Barrels, Lowers, Receivers, Etc Search results for: '300 blackout 16 inch with 1 7 twist kit' AR-15 & AR-10 Rifles, Pistols, Uppers, Barrels, Lowers, Receivers, Etc . Possession of this barrel along with a Non-NFA lower . A 1:7 or 1:8 twist rate works best with . 300 AAC Blackout. Items 1 to 12 of 15 total Sort By Best Sellers GM-M11S M4 11.5", Finned Barrel in 5.56x45mm 1:7 Twist $195.95 GM-B5 17"Chambered Gunsmith Edition 300 Blackout 1:7 twist $144.95 300BO-BLANK 25" x 1.25" 300 Blackout Barrel Blank barrel 1:7 Twist $63.95 Every gun has its shortcomings, and for the PSA 8.5 Pistol-length 300 AAC Blackout, it doesn't ship with sights on. This barrel carries the same thread pitch as the AR-10 barrels 5/8x24 to add a muzzle device Our barrels are made with the finest 416R Stainless Steel and 4150 Chrome Moly Vanadium steel for high accuracy and durability. TRYBE Defense AR-15 Pistol 10.5in Complete Upper M-LOK, .300 Blackout. See Price on Optics Planet. 5/8"X24 Tread Pitch. Our Price: $170.05. Hide Filters Show Filters Other In Stock Barrel Caliber 300 BLK (7) . Well above the bullets design. Specifications. 8.5" 1.10 lbs. The only real question is what twist rate to go with. Twist rate is represented by a ratio of inches per turn. Email. 35%. Uses standard AR-15 BCG. The 300 Blackout (300 BLK) was designed by Remington/AAC to create a reliable, compact .30 caliber round for the AR platform that uses a standard bolt and magazine. If installing on an AR rifle, not building an AR pistol, please see this article on SBR's. . Chambered: .300 BLK (AAC Blackout) 1:7 Twist.750" Gas Block Diameter. You've just added this product to the cart: 10" .300 BLACKOUT PISTOL LENGTH AR 15 BARREL, MODERN SERIES. .300 Blackout. This barrel features helical engraving, 5/8-24 muzzle threads, pistol-length gas system with gas port hole, setscrew flats . Gas System - Pistol length. In Stock. Stag 15 16" Barrel in .300 Blackout with 1:7 Twist Rate - Pistol-Length - Nitride. Odin Works 300 BLK AR-15 Barrel 1:8 Pistol Length Medium Contour 16.1" w/Gas Block. 7.5" 300 Blackout 1:8 Twist 4150 Barrel. Subscribe to back in stock notification . The .300 Blackout cartridge is available . Read more. Then get the Midwest Industrys 7.25" SP Free Float Handguard, Low profile .750 gas block Wison,Troy, or BCM, then by Hunter, Gear Expert, March 31, 2022. This .300 Blackout chambered 10 inch 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. The Blackout AR15 Pistol Barrel Features: Length-10". Featuring a 1:8 twist rate, this barrel makes it ideal for .300 Blackout rounds that are between 115 to 165 grains. All NFA/ATF Rules Apply You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Most AR-15's have a 1:7 twist rate, which means one complete rotation over 7-inches of barrel length. Took the time to indicate properly to .0001, for a precise muzzle crown and thread. 300BLK vs. 7.62x39? The Ballistic Advantage Modern version AR pattern 300 Blk barrel features a distinct rigid pattern for extreme rigidity. Sig made the MCX for the subsonic crowd to shoot out of very short barrels. You might not like this product if: You want sights. 2 Reviews. 7.5 300 Blackout Barrel 1 x 7 twist. Barrels discussed are a PSA. Email. ACC, the company that developed the Blackout 300 cartridge, recommends the 1:7 twist rate. The BCA AR-15 Barrel is a 7.5" heavy profile barrel made of 416R stainless steel with a stainless finish, a pistol length gas system with a 1:7 twist rate. Twist rate is way down the list of things that will affect your accuracy with 300 Blk supersonic loads. Show . This barrel comes with a heavy profile and was designed to endure high rates of fire. Muzzle Break - 5/8-24 Thread. The length maximizes maneuverability and allows for positive control of the muzzle while moving to contact. Chamber - 300 Blackout AAC. AR .300 Blackout 16" Inch Rifle Barrel Carbine Gas System 1:7 Twist Parkerized Finish (Made in USA) Shipping. A 9 long .300 Blackout AR drop-in type barrel. You also need to consider the twist rate of the barrel on your.300 BLK AR-15. That short barrel length also comes in handy when you add the extra length of a suppressor onto your rifle. Chambered in 300 Blackout. View as. Because subsonic loads are made with heavier projectiles (usually 225 grains or more), you may be better served by . This barrel features two sections of 5 spiral flutes, helical engraving, 5/8-24 muzzle threads, pistol-length gas system with gas port hole, setscrew flats on . Quick view. 4140 gun quality steel, heat tread to RC 28-32 hardness, stress relieved. (6) 10" 300 BLACKOUT AR-15 1x7 BALLISTIC ADVANTAGE DRP PROFILE PISTOL LENGTH BARREL - MODERN BABL300006M. Perrfect PDW engineered size for 300 AAC Blackout is 8". Qty. Quick View. GMRB did all the hard work. This 300 Blackout barrel is great for your next pistol build or SBR. 300 Blackout uses the same bolt carrier group and magazines as 5.56 and 223, meaning you only need to change out the barrel to shoot a new caliber out of your mil-spec AR-15! Yeah, I guess that's why Ruger makes the American Ranch in 300 Blackout with a 16" barrel and 1:7 twist. AR-15 HBAR BARREL, MID-LENGTH GAS, CHROME-LINED . Go with 1:7, subsonics will keyhole with 1:8. Threaded to accept all 5/824 muzzle devices and flash hiders. 4140 Gun Quality Steel, Heat Threaded to RC 28-32 hardness, Stress Relieved. Description A 9 long .300 Blackout AR drop-in type barrel. With a 300 BLK, you can shoot larger . Feed Ramp - M-4 Feed Ramps. Best twist rate for 300 Blackout? A. With supersonic rounds for maximum muzzle velocity to subsonic loads that quiet the roar by slowing the pace. Because subsonic loads are made with heavier projectiles (usually 225 grains or more), you may be better served by . Please add to cart for sale price $139.99 $162.00. Clear All . A mystique surrounds the .300 BLK (AAC Blackout), and it overshadows this utility player's ability to deliver All-Star numbers in a variety of roles. . This barrel is chrome-lined and phosphate-coated according to mil-spec standards. 10.5 300 Blackout Stainless Steel Barrel 18 Twist. The 16" 300 AAC Blackout comes standard with a 1/7 twist rate and a 5/8x24 thread pitch. 1 Item. Length: 9.0. On a different day, . Shipping: Noveske's 300 AAC BLACKOUT is designed to run optimally firing both subsonic suppressed and supersonic unsuppressed. Machined a 9.5 inch barrel from this chambered blank, ended up with an amazing accurate shooting AR15 pistol. 9 inches is the perfect size to burn all the available powder in the 300 blackout cartridge allowing you to maximize your potential. RETAIL: $165.00. Material: 4150 CrMoV. AR-15 300 Blackout 16" Combat Upper Assembly / 15" Mlok / Multiport features:Barrel - 16" 4150 CMV hbar. Finished Barrels go through a 100% Inspection Process. Add to Wishlist. Site Areas; Settings; Please add to cart for sale price $229.99 $289.75. Caliber- 300 Blackout/.308 Twist Rate- 1:7 Length- 25" Profile- Raw Barrel Blank Steel Type- 41V50 Product Reviews Very Good Barrel Blank Posted by Jimmie Sommerfield on 16th Apr 2018 Very straight and true, break in was easy, shoots less than 1/2 moa. SuburbanHick; Mar 16, 2022; Buy - Sell - Trade ; Replies 4 Views 365. Took the time to indicate properly to .0001, for a precise muzzle crown and thread. $199.99. Caliber: .300 Whisper / .300 AAC Blackout Weight: 8.53 lbs Rifle Overall Length: 39.7 in Action: Bolt Rifle Barrel Length: 9.8" Rifle Barrel Twist: 1:8" Magazines Included: (1) 10-Round Magazine Iron Sights No Caliber or Gauge: .300 BLK Handedness Right Hand Item Condition New Product Type Rifles MPN BT-SPR300 Anderson Manufacturing 300 Blackout 16" Barrel - 1:7 Twist - M4 Medium Contour - Carbine . These 300 Blackout barrels from BA are 9 long with a 1:7 twist rate for proper stabilization. Related Items: Since a 300 BLK cartridge is on average heavier than 80 gr, it will shoot best with a 1:7 twist in order to provide the most efficient stabilization and accuracy. Subscribe . Add To Compare. 5.00 out of 5. The description says "Nickel Boron" finish. Add to Wish List . Accessories McGowen precision 300 blackout 1-7 barrel FS/FT $150 shipped. Customers Who Viewed This Product Also Viewed Exact Weight: 10.5" 1.25 lbs. I have one with a Rugged Surge 762 on it and shoot Remington 220 gr Open Tip Match (Subsonic) with a 3-9x-40 and shoot 1-1.5 MOA at 100 yds (with a bipod). This barrel is tuned to lock back on the last round using subsonic 220 and 208 grain ammunition with a sound suppressor. .750" gas block diameter. Barrel Thread - 5/8 x 24. $199.99. The muzzle is threaded 5/8"-24 for use with muzzle brakes, flash suppressors, or sound suppressors. 5/8x24 thread. 10.5" 300 Blackout Stainless Steel Barrel 1x8 Twist. Out of stock. Barrel Steel - Chrome Moly. Subscribe to back in stock . . Some suggestions to try: 110 V-Max, 110 Barnes black tip (not an accuracy bullet, but arguably the best terminal performance of any big manufacturer), 125gr Nosler Ballistic Tip, 125gr Sierra Tipped MatchKing. Ranger, 300 Blackout, 16" Barrel, 1-7 Twist, Green. .300 Blackout 1:7 Barrels (28 Products) Filter By . Both AAC and Noveske use a 1:7 twist rate, while the PWS 300 BLK upper uses a 1:8 twist. Tracking number will be sent as soon as the order is shippped . Chambered: .300 BLK (AAC Blackout) 1:7 Twist. Let's find out! Ballistic Advantage, Modern, Distinct Rigid Pattern, Barrel, 300 AAC Blackout, 8", 1:7 Twist Perfect For The Q Honey Badger or Sugar Weasel AR Clone! Details. All NFA/ATF Rules Apply You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Quick Navigation Do it Yourself Gunsmith Top. M4 feedramps. 1-8 rh twist , .750 under gas block. Best 10.5-inch. PRODUCT DESCRIPTION Aero Precision APRH100063: 10" .300 Blackout Pistol Barrel is the perfect addition to your AR15 build. . 300 Blackout is very effective as a hunting round, add a silencer and sub-sonic rounds and you have a quiet efficient killing machine. Go to cart page. Improving stability, it contributes to improving the overall accuracy of your shooting. Carbine Length with Enhanced Gas Port Hole Diameter. You certainly can shoot various weights through less than ideal rifling; you simply won't get the maximum effectiveness out of the bullet. Made of 4150CMV ordnance grade barrel steel for increased durability and its ability to handle heat from hard use; . Also known as 300 BLK, This type of chambering was created by Advanced Armament Company to replace the MP5SD, a special ops 9mm machine gun. 300 Blackout's effective range can stretch quite a bit depending upon your goals. 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. Describes why I would choose a 1/7 twist rate barrel and some range time showing heavy bullets through my 1/8" twist rate barrel. Very pleased. Caliber- .300 Blackout Nitrided (Melonite) Barrel. Crafted to mil-spec standards from 4150 Chrome Moly Vanadium with a QPQ corrosion-resistant finish, this barrel provides time-tested precision and accuracy for your AR15 .300 Blackout Pistol build. CMMG 8" 300 Blackout Barrel (300 BLACKOUT) - $139.95 CMMG 8" 300 blackout Barrel 4140CM SBN (300 BLACKOUT) Length: 8", 1: 7" Twist Chamber: 300 BLK Profile: Medium Contour Profile Material and Finish: 4140 CrMo, Salt Bath Nitride Finish (Melonite) Muzzle Thread: 5/8"-24 TPI Gas Port Location: Pistol . . From my understanding the longer .300 barrels were an afterthought. It features a 1:7 twist rate, ideal for stabilizing subsonic projectiles, and a standard 5/824 thread pitch, which accepts most .30-caliber muzzle devices. Add to Cart. Those shooters who intend to use mostly supersonic loads with lighter cartridges (between 110 to 150 grains) will benefit from a 1:7 twist rate, while heavier subsonic loads . The setup was equipped with a Trijicon AccuPoint 5-20X50 scope, dialed to 20X. 1/5 Twist ideal for Q Honey Badger, Sig Rattler or any other 300blk pistol or rifle with 1/5 twist barrels. .300 Blackout.300 Blackout. Our designation for this barrel is the AR955. Rating: 97%. market street cafe lockhart SERVICE. If you are going to shoot subsonic targets with heavier projectiles, then the 1-8 twist rate is ideal for you. Description. What is the best barrel twist for 300 blackout? We offer a wide range of barrels for the AR-15 platform. What is the best barrel twist for 300 blackout? 300BLK vs. 5.56? For example, many AR-15s feature a 1:7 twist rate. Twist rate is the rate of spin of the barrel rifling. per page . This .300 Blackout chambered 6 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. Twist: 1-7 # Grooves: 5 Groove. The 16" 300 AAC Blackout comes standard with a 1/7 twist rate and a 5/8x24 thread pitch. Finish: Chrome-lined, Phosphate. AR-15 300 AAC blackout 10.5" classic mlok upper assembly is a perfect addition to your AR pistol. Barrel Twist - 1 x 7. Out of stock.223/5.56. The CMMG 300 AAC Blackout Barrel features 1 in 7" twist rifling and a pistol length gas system. CMMG's durable salt bath nitride finish is a unique protective coating applied to the barrel that surface-hardens . The 300 Blackout was designed by Remington/AAC to create a reliable, compact .30 caliber round for the AR platform that uses a standard bolt and magazine. If installing on an AR rifle, not building an AR pistol, please see this article on SBR's. . Parkerized finish. Twist-1-7. 300 Blackout is optimized for suppressed fire with heavy bullet subsonic loads but can also be used with supersonic ammunition when extra range is needed. As for 1/7 or 1/8 barrels, the problem is in finding 1/7 twist 300 blackout barrels as a number are only offered in 1/8. The PSA 8.5 Pistol-length 300 AAC Blackout comes with a 1:7 twist rate and a nitride coated barrel which makes it ideal for AR pistols to achieve maximum accuracy. Details. Next Page: 1; 2; Ballistic Advantage Performance Series 10.3" .300 Blackout Hanson Profile Pistol Barrel with Low Profile Gas Block - BABL300007F . Sort By: Items 1 to 24 of 28 total . $149.95 $94.99. laura cone norm abram SPEED olivia bromley birthplace BiZDELi .300 BLK (AAC Blackout) 1:7 Twist.750" gas block diameter; Carbine Gas System ; 5/8"x24 Thread Pitch; 4140 gun quality steel, heat treated to RC 28 . KAK 1:8 300 BLACKOUT 9 INCH PISTOL SS BARREL "MR BLOND" Special Price $180.00 Regular Price $265.00 As low as $150.00. Assembly Weight : .97 lbs (7), 1.8 lbs (16) Muzzle Thread: 5/8-24. The 300 Blackout ammunition gives you the best of both worlds by meshing a heavy .30 caliber round with the effectiveness and versatility of the AR-15 platform. Choose Options. What barrel length is best for 300BLK AR-15s? The twist rate is 1-7. Finish: Parkerized. Barrel Twist 1:8 (7) Barrel Weight .87 lbs (1) .97 lbs (1) 1.10 lbs . Qty. The twist rate is 1-7. All you need is 300 BLK ammo and this upper - and you have a new AR. Most of the the industry seems to be moving to 1:7 for the barrel twist as a compromise.