KG Stinger M-LOK 300 AAC 8. Login For Price. The Black Dawn 300 AAC Blackout Model comes equipped with: 6 POS COLLAPSIBLE MOE STOCK. Price shown is upper only. We only use quality parts made in the USA. This TYPE-A MR2-8. Featuring: 1×8 Twist 4150 Nitride Barrel, Low Profile Gas Block, and Slim 7″ Live Free Armory KeyMod Free Float Handguard. 223 rifle to 6. Bushmaster XM-15 Complete Upper w/Bolt 300 AAC Blackout Flat Top M4-Profile 16 in. 300 BLK vs 7. 5" 300 Blackout Hbar 1x7 Stainless Steel w/ UTG MTU008. The Radical Firearms 8. 5" Pistol-Length 300 AAC Blackout 1/8 2A Keymod Upper With BCG & CH. 300 Blackout. 5″ 300 AAC Blackout Stainless Steel Upper Assembly $ 375. Handguard is uncoated. 5 GEN3 MLOK Handguard with a SILENCERCO ASR muzzle to give it that intimidating stance. At that time, we’ll get your FFL information, or help you find one to ship it to. View Details. PA-15 Complete Firearms Barreled Upper Assemblies. Note: Per ATF, AR-15 Upper Receivers are NOT Firearms and do not require an FFL Transfer. 95 Barrel Length: 8. – Omni Hybrid Maxx Polymer Upper Receiver With Metal Insert – Omni Hybrid Polymer Lower Receiver With Metal Insert – 8. 300 Blackout. 5" View Details. com/affiliate-links. As low as $504. Offering you complete AR 15 uppers from a host of reputable manufacturers in the firearm. Find Complete. 300 Blackout 1-8T QPQ Nitride Barrel 9" KeyMod Handguard (Assembled or Unassembled). Ammunition Depot offers a wide variety of complete AR15 uppers for multiple calibers, including 224 Valkyrie, 300 Blackout, 458 SOCOM plus much more. 300 Blackout Ammo For Sale. Fast shipping and satisfaction guaranteed. I bought a PSA 300 BLK upper a couple of months ago. Model 1 Sales is a quality based AR15 / M16 component and accessories provider. The 300 AAC Blackout is here to stay. If you searching for special discount you'll need to searching when special time come or holidays. What I will do is point you do a few of the best. MTR is Utah's Premier Supressors and Class 3 Firearms Dealer! HEXMAG HX30-AR Magazine 223/5. P: 877-461-2572. 750-(12)LWKM Categories: 16" 300 Blackout Upper , 300 Blackout Upper , Best Sellers , Featured Products , Best Value. price comparisons for Ballistic Advantage 8. 56 1x7 and 300 AAC Blackout Uppers Bundle Cerakote Option. This upper uses the Yankee Hill Machine Diamond Series Quad Rail which is aluminum quad rail system. 5 rifle runs our TYPE-A MR2/7. Complete uppers, barrels, forends, and many other accessories. 300 blackout caliber uppers use your standard. 5" Radical Firearms Make sure you. 5" 556 Stainless Steel Pistol Upper with 7" Free Flat Handguard (0). We use barrel blanks that are above industry standards and produce our own Billet stainless steel AR barrels to use with our 300 AAC blackout uppers. The Leonidas balances blow back and ejector port noise with world class suppression to give the user an extremely pleasant shooting experience. We carry parts for AR 15,. 300 black out AR 15 Barrels in Distinct rigid pattern from 7. Pin Radical Firearms to Pinterest. Description: PSA 8. 2" SERIES - BLEM $229. 300 Blackout Complete Upper For Ar You will not regret if check price. mk109 pro upper receiver complete 300 blackout. 5" 300 Blackout SBR / Pistol Upper w/ Odin Works barrel, rail, and Black Rain / Syrac adjustable gas block. 5" 1:8 300 AAC Blackout barrel Pistol gas tube Low profile gas block (. 5 300aac Blackout Barrel – 7 Free Float Rail – Low Profile Gas Block – Includes One 30rd Magazine – Flat Top Optics Ready. 5″ 300 AAC Pistol COMPLETE Blackout Upper Assembly - Stainless or Parkerized $ 353. That higher velocity also means that the 6. The POF USA Renegade + AR is available with a number of barrel lengths, all the way up to a 16" barrel, but this 10. Finish: Black annodized Barrel nut material. 3″ 9MM M-LOK4 PISTOL UPPER COMPLETE $ 499. Note: Per ATF, AR-15 Upper Receivers are NOT Firearms and do not require an FFL Transfer. 5" View Details. We are completely designed and manufactured within the United States. All that is needed to harness the enhanced performance of the 300 AAC Blackout is a simple barrel swap; the bolt, carrier, magazine and all other. 5 300 Aac Hbar Buy Firearms Radical Firearms 8. AR-15 Free Floating Handguards and Rail Systems; AR-15 2 Piece. 300 AAC Blackout is an incredibly versatile cartridge. Description. This Rosco 10. For marksmen who value accuracy but wish to reduce recoil and loud rifle blasts during training sessions, a 300 Blackout SBR barrel is one of the best upgrades to buy for the M4 carbine. 300 blackout and machined with. The faster twist rate is perfect for the 220 grain ballistic monsters that subsonic 300 BLK ammunition use, but for the lighter hunting rounds (like Barnes’ 110gr round) not so much. 300 blackout caliber uppers use your standard. Built for novice and advanced shooters alike, this complete upper package offers superior design and the ability to quickly upgrade to a free floating handguard down the road, while still being perfectly fine the way it sits. Our pistols run a fully adjustable 45/90 degree short throw safety selector and an extended magazine release to give you that perfect feel. 300 Blackout Kits Looking to start a new AR rifle or pistol build for 300 blackout look for further then ghost for your next upper receiver or rifle kit available in 300 blackout. 300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 10" MLOK. 223 Barrels. The test platform is the Barnes Precision CQB rifle reviewed here. I am very pleased with it. 300 BLK harnesses the power of the battle-proven round for more capability and versatility in a compact platform. 5" pistol length 1:7 twist w/ 4. Tombstone Tactical offers an extensive selection of custom rifles used for precision accuracy, including M4 Tactical Rifles and AR-15/10 Tactical Rifles. We are completely designed and manufactured within the United States. 3″ 9MM M-LOK4 PISTOL UPPER COMPLETE $ 499. All NFA/ATF Rules Apply You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. 5 inch CMMG barrel using an SLR adjustable gas block and a Joe Bob side cocking upper. Upper is made of all brand new parts. 5" Hbar profile 300 AAC Blackout is a MIL-STD upper ready to drop on any MIL-STD lower Receiver. , mate the AAC barrel with one of their quality upper receivers and hand guards. 300 Blackout with a 1:7 twist and pistol length gas system. Complete AR15 Uppers. Bear Creek Arsenal Code 704tactical for 5% Off BCA AR-15 Complete Pistol Upper Assembly, 10. Surplus Ammo is your premier source for complete uppers. 300 Blackout Barrels for Sale. 308 products. 5 300 Blackout. 5 built from scratch, I wanted it shorter for fitment with my can inside of a longer handguard. 30 caliber round for the AR platform that uses a standard bolt and magazine. I tried all kinds of recommended loads in a search for ammo that would cycle my first carbine length 300 blk upper. Bear Creek Arsenal BCA 16" 300BLK Complete MLOK AR15 Upper AR-15 300 Blackout 1:8. Q Collapsible Stock. AR15 Complete Firearms. GunSkins are DIY camo gun wraps that can be installed on any rifle, shotgun, pistol, and including airsoft replicas. 300 blackout which is rare. Follow Radical Firearms on Instagram. ar-15/m16 300 blackout upper receiver. Complete with a rugged SB Tactical SBX-K forearm brace and a 9-inch Melonite® treated CMV barrel, the SAINT AR-15 Pistol is small, fast, and ideal for CQB. Now, everything I put through it cycles properly. COMPLETE unfired PSA 300 blackout upper. I ran 140 rounds through it today. 223 Wylde w/ 13" Free Float 7 sided Keymod Fore End - Less BCG and Charging Handle. 300 BLK vs 7. Login For Price. These upper receivers are built in-house by expert builders with over 40 years of experience. Free shipping and returns on "8 5 300 Blackout Complete Upper Online Wholesale" for you purchase it today !. DIRECT IMPINGMENT ADJUSTABLE GAS SYSTEM FFL REQUIRED TO SHIP THIS ITEM. The Quiet Piston-Driven. Gunkeyword Cmmg 9mb Blowback. BCA AR-15 Complete Upper Assembly, 8. 300 Blackout Complete Upper For Ar @Don't read "Today, if you do not want to disappoint, Check price before the Price Up. As low as $504. Find the full line of firearms, parts and accessories from Daniel Defense, including AR-15's, AR-Pistols and Bolt Action Rifles for sport shooting and hunting. 300 AAC Blackout The 300 Blackout (300 BLK) was designed by Remington/AAC to create a reliable, compact. NEW COMPLETE UPPER: Radical Firearms cfu8. 5 300 Aac Hbar. Our expertise. Complete uppers, barrels, forends, and many other accessories. value line barrel these barrels proved to be so popular that we decided to make them a regular item 19. greenmountaindefense. 16" Tac-Hunter G4 300 Blackout Complete Upper Receiver. Available in stripped, built and complete. 300 AAC Blackout is an incredibly versatile cartridge. 300 Blackout Uppers; 40 S&W Pistol Uppers; Charles Daly AR 410 Complete Upper 410 Gauge 19" Barrel KG Mayhem 22LR 8. Here we specialize in making top quality uppers at affordable prices. Surplus Ammo is your premier source for complete uppers. What you have now is the ultimate short range thumper that will feed both supersonic and subsonic ammunition and get its full ballistic potential (complete burn of the powder) from a 9-inch barrel. 300 Blackout Complete Rifle. – Omni Hybrid Maxx Polymer Upper Receiver With Metal Insert – Omni Hybrid Polymer Lower Receiver With Metal Insert – 8. 2" SERIES - BLEM $229. Mil Spec Barrel Nut. 300 Blackout 16" Inch Rifle Length Barrel 1:8 Twist Black Nitride Finish (Made in USA)A. If you want to buy AR-15 8. Comes with BCG and charging handle. 5" 300AAC BLACKOUT Upper 1/7 twist w/ FCR M-LOK Rail The Radical Firearms 8. 750 Low Profile Gas Block. We maintain our high standard of tolerances and attention to detail as the uppers we use for complete rifle builds. Pin Radical Firearms to Pinterest. See Detail Online And Read Customers Reviews Ar-15 Upper Receiver Assembly 300 Blackout 8. 5 300 Aac Hbar Buy Firearms Radical Firearms 8. 5 Grendel v. 308 rifle vs just a. 5" m-lok handguard - complete upper Includes:AR. If you're still on the 300 BLK fence, you need to. Built for novice and advanced shooters alike, this complete upper package offers superior design and the ability to quickly upgrade to a free floating handguard down the road, while still being perfectly fine the way it sits. [WTS] PSA 8. Our pistols run a fully adjustable 45/90 degree short throw safety selector and an extended magazine release to give you that perfect feel. Hot off the heels of double Yankee Hill Machine silencer reviews this past Saturday, we are right back at you today with some 300BLK subsonic goodness. Chrome Moly Barrel with 1x8 Twist and M4 Ramps. archive for upper assemblies. [email protected] It’s capable of ringing targets at 300 meters while operating with near silence when suppressed. KG Stinger M-LOK 300 AAC 8. Bear Creek Arsenal Code 704tactical for 5% Off BCA AR-15 Complete Pistol Upper Assembly, 10. 300 Blackout Pistol Uppers constructed using highest quality barrel steel and receiver materials, Receivers are 7075 and Barrels are 4150 steel or 416R SS. 56 socom 12″ fgs upper assembly – by radical firearms. 5" Lightweight M-Lok Upper - With BCG & CH M4E1 Threaded 16". 300 blackout feed ramps in the barrel extension. 300 Blackout short cycling - NOW UP AND RUNNING! within the M16 AR15 forums, part of the Rifle Forum category; I'm having some short cycling issues with my new rifle. 00 : Rainier. ZEV custom 416R 8. COMPLETE unfired PSA 300 blackout upper. Cruising along at subsonic speeds, the 300 Blackout puts a wallop on any target, and the 300 Blackout Upper delivers the punch can all be found right here. 5″ 300 AAC Barrel 4150 Chrome […]. The Quiet Piston-Driven. Radical Firearms Complete Upper 8. We use barrel blanks that are above industry standards and produce our own Billet stainless steel AR barrels to use with our 300 AAC blackout uppers. 99 Regular Price $504. mk109 pro upper receiver complete 300 blackout. Click Image for Detail Radical Firearms AR15 Pistol ASK A QUESTION Description Radical Firearms AR15 300 Blackout Pistol 8. 5" RENEGADE+ PISTOL. Unlike some sellers, we always specify the manufacturer of the parts therefore you know exactly what you are getting. 5″ 300 BLACKOUT UPPER BLACK RAIN ORDNANCE 458 SOCOM COMPLETE UPPER $ 899. Click Image for Detail Radical Firearms AR15 Pistol Description Radical Firearms AR15 300 Blackout Pistol 8. Note: Per ATF, AR-15 Upper Receivers are NOT Firearms and do not require an FFL Transfer. value line barrel these barrels proved to be so popular that we decided to make them a regular item 19. Ammunition Depot offers a wide variety of complete AR15 uppers for multiple calibers, including 224 Valkyrie, 300 Blackout, 458 SOCOM plus much more. AR15 Are you looking for the best ar15 free float handguard?. 300 Blackout Uppers; 40 S&W Pistol Uppers; Charles Daly AR 410 Complete Upper 410 Gauge 19" Barrel KG Mayhem 22LR 8. Google has removed all gun related apps from Google Play store. 00 Add to cart; Build Your Own 300 Blackout Upper Assembly Select options; 300 Blackout 7. Built for novice and advanced shooters alike, this complete upper package offers superior design and the ability to quickly upgrade to a free floating handguard down the road, while still being perfectly fine the way it sits. ar-15/m16 300 blackout upper receiver. KAK INDUSTRY is a design and manufacturing company that specializes in wildcat uppers for LR-308 platform and AR15. 5" 300 BLACKOUT BARRELED UPPER - OMEGA 7. offers a complete line of American made, custom built AR15 style rifles. AR Upper Kits. Welcome! When you purchase a firearm from us online, we will contact you in a few business days to complete the transaction. 56 1x7 and 300 AAC Blackout Uppers Bundle Cerakote Option. This Barrel Is Made From 4150 CMV QPQ Nitride With A Thread Pitch Of 5/8x24 And A Twist Rate Of 1-8T. Our charging handle is fully Ambi giving you complete control from either side. 5" 300 Blackout Upper Receiver AR15 Pistol Chrome Moly 1x7 Gen 1 Midlength Quad Rail Our Price: $289. The 4150 steel barrel features a black nitride finish (including bore and chamber), 1:7 twist for super- or sub-sonic use. 5 inch 300 Blackout AR-15 Side Charging Upper. We carry parts for AR 15,. 2" SERIES - BLEM $229. Pistol Length Gas Tube) Pre-Ban (1) $709. We are completely designed and manufactured within the United States. I think its time to get an upper for that lonely lower. -Has the ability to cycle both super and subsonic ammunition without modification. The Radical Firearms 300 Blackout HBAR Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any Mil-Spec AR-15 lower receiver! This fully mil-spec compliant receiver provides a high-quality upper for any level budget or shooter. The 300 Blackout uses a shortened and necked-up 5. Description: PSA 8. Description. Barrel Info: This 300 Blackout upper is built around one of our 8. What is the effective range of a 300 blackout? From a 16 in (410 mm) barrel, a 125 gr (8. I can buy a 9" 300 BLK upper with the click of a mouse but before I put it on my Daniel. " buying 300 Blackout Complete Upper For Ar. The complete uppers featured in our store sport a premium quality construction made using material tested and proven to work. ar-15 pistoil complete upper in 300 aac blackout, keymod, 8. 300 Blackout Barrels for Sale. We only use quality parts made in the USA. 5 Grendel - Please note: If the listing says In-Stock it means we have all of the items in stock. 5″ Stainless Steel or Parkerized HBAR COMPLETE Upper. 49 Save 14%. If you searching for special discount you'll need to searching when special time come or holidays. I built a 300 blackout upper with a 8. 5 inch 300 Blackout AR-15 Side Charging Upper. You'll see our 300 Blackout (AKA: 300 BLK) Upper assemblies cater to every shooter. At that time, we’ll get your FFL information, or help you find one to ship it to. 300 Blackout with a 1:7 twist and pistol length gas system. Radical Firearms 8. Has there ever been a 'realistic' study of how many would be killed & wounded in a. Surplus Ammo is your premier source for complete uppers. 5" AR15 Complete Billet 300 Blackout SBR Black Rain Ordnance / Odin Works Complete 10. Radical Firearms 300 BLK Barreled Upper - 8. Available in stripped, built and complete. We are proud to provide the best upper receivers on the market. Aero Precision M4E1 Enhanced 8. Palmetto State Armory. 99 was $285. 9 300 BLK AR Barrel-This barrel assembly is all you need to convert your 5. 5" 300 Blackout Upper is an optics-ready upper receiver for your next 300 Blackout pistol build. This upper will work on any AR15 small pin lower. Palmetto State Armory 8. 00 Add to cart; Build Your Own 300 Blackout Upper Assembly Select options; 300 Blackout 7. AR15 Are you looking for the best ar15 free float handguard?. 5" 300 BLK Complete Upper with 9" M-LOK Rail and Flip Up BattleSights - Black. Fast shipping and satisfaction guaranteed. We check headspace and test fire every complete upper that is ordered with bcg and charging handle. I ran 140 rounds through it today. This is a complete AR-15 upper receiver kit with a 12" Quad Rail and 16" Blackout BarrelThe parts included are below: 16" Blackout Barrel Barrel Thread - 1/2" x 2812" Quad Rail Hand GuardGas Tube, and low pro gas blockEjection Port CoverCharging HandleForward AssistFlash Suppressor with Crush Washer M-16 Bolt Carrier GroupAnodize Color OptionsThis kit come with Upper Receiver in the following. Our charging handle is fully Ambi giving you complete control from either side. Welcome! When you purchase a firearm from us online, we will contact you in a few business days to complete the transaction. 300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 7" LWKM Rail Sku: 805-UA300PHB8. 5" Upper with Flash Cone Conversion. 5” match barrel with bronze PVD coating, chambered in. This TYPE-A MR2-8. 5 300 Blackout. I ended up having to drill out the gas port a bit. Note: Per ATF, AR-15 Upper Receivers are NOT Firearms and do not require an FFL Transfer. AR15 Complete Firearms. 5 barrel,556 upper,m4 complete upper,Selling From Orlando Florida. While a complete 6. Q Collapsible Stock. F: 813-792-2767. 8 SPC assembly is a somewhat more expensive route, the conversion of an existing 5. 223 Wylde w/ 13" Free Float 7 sided Keymod Fore End - Less BCG and Charging Handle. Great transaction, couldn't have been better. 300 BlackOut. 300 Blackout Upper. Gunkeyword Cmmg 9mb Blowback. Here we specialize in making top quality uppers at affordable prices. Our assembled upper receivers are made to order, please check HERE to view our. These upper receivers are built in-house by expert builders with over 40 years of experience. 5" Pistol-Length 300 AAC Blackout 1/8 2A Keymod Upper With BCG & CH. The Quiet Piston-Driven. 300 Blackout Upper Kit. 300 Blackout Barrel From ELD Performance. The Radical Firearms 8. AR-15 ''STANDARD'' Pistol Kit ** THIS KIT DOES NOT INCLUDE LOWER RECEIVER OR MAGAZINE ** ** KITS CANNOT BE CHANGED, NO MODIFICATIONS WILL BE ACCEPTED ** AR-15 Light Weight Keymod Handguard 7" BCA 7. Simply click one of the links below and save the template to your computer. 5 300 Aac Hbar Buy Firearms Radical Firearms 8. 300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 10" MLOK. I bought a PSA 300 BLK upper a couple of months ago. The Quiet Piston-Driven. This 300 Blackout assembly includes a 9" medium profile barrel with a 7" Windham Weaponry free-float railed handguard. COMPLETE 10. 300 blackout which is rare. Here at Veriforce Tactical we pride our selves on Building and producing only quality AR 15 300 Blackout Upper Receivers. 300 Blackout Barrels for Sale. 300 AAC Blackout. 5 300aac Blackout Barrel – 7 Free Float Rail – Low Profile Gas Block – Includes One 30rd Magazine – Flat Top Optics Ready. 5" 300 Blackout Barrel + 5/8-24 Thread Protector + Low Profile Gas Block, installed with rockset + Pistol gas tube $225 shipped I also have these parts which I can sell with it, or install/complete for you:. 5" 300 AAC Pistol COMPLETE Blackout Upper Assembly - Stainless or Parkerized comes with M4 barrel extensions with a Manufacturers Limited Lifetime warranty against defects. Complete AR15 Uppers. 300 Blackout AR-15 FAR07 Pistol Upper-AR-15 Free Float Quad Rail Handguard Carbine Length 7 Solid 6061 Aircraft Aluminum Construction with Hard Anodizing CNC Precision Machined Picatinny/Weaver Rail Type Extended Top Rail Provides NO-GAP Install. In Addition A Magazine Is Now Included With All Omni Hybrid Maxx Pistols. 300 Blackout with a 1:7 twist and pistol length gas system. Radical Firearms FR16300HBAR15FCR. The Noveske 8. Selway Armory promises to provide a great product at a great price along with world class customer service. 5-300hbar-7fcr 8. 300 Blackout upper if you are looking for a no frills, no gimmicks ready to shoot upper. 300 BLACKOUT Barreled Upper Receiver Group for your AR15, M16, M4, with BCM KMR-A10 Rail Installed. Founded and made in Missouri, CMMG is a 100% USA Made success story. 300 AAC Blackout Uppers here. This Stripped Upper Is Precision Machined To Mil-spec M16/M4 Specifications And Features M4 Feedramps. 5 Grendel, AR15, AR 15, AR-15, AR15 upper, custom upper, Lilja, DPMS, Precision, Precision Firearms, Precision. 5 300blk PSA upper. 300 Blackout Uppers in a variety of lengths from top quality manufacturers with great value pricing. 99 On sale: $186. Here at Midsouth Shooters we want you to have the best selection of products to help complete your AR 15 rifle build. Fast shipping and satisfaction guaranteed. We are committed to providing every customer with "Quality Parts at Reasonable Prices!" Our foundation is built on excellent customer service, honesty and integrity. Our expertise. 300 AAC BLK Blackout 1/8 with 10" Standard Quad Rail Pistol Upper "Stub Nose". Black Rain Ordnance / Noveske Complete 8. 223 Wylde lines of barrels and uppers, and in 2014 brought you 300 Blackout barrels and uppers. Arrives at your door with the hard work done. BCA AR-15 Complete Upper Assembly, 8. At least with the right bullet profile, it is possible to fit a 300 Blackout cartridge into a 5. the next step on your AR is to upgrade to a 300 Blackout upper from ghost. 5 built from scratch, I wanted it shorter for fitment with my can inside of a longer handguard. Bushmaster XM-15 Complete Upper w/Bolt 300 AAC Blackout Flat Top M4-Profile 16 in. 300 Black Out HBAR 7 Free Float MLOK Rail. The Leonidas balances blow back and ejector port noise with world class suppression to give the user an extremely pleasant shooting experience. 308, 9mm and more at discounted prices. 5" Pistol-Length 300 AAC Blackout 1/8 2A Keymod Upper With BCG & CH It is the customer's responsibility to be aware of all applicable laws and regulations regarding the purchase an Click for more info. Sportsman's Guide has your Anderson EXT 300 BLK Pistol Complete Upper Receiver, 7. We're the supplier of ar15-m4-m16 parts and accessories serving United States,we do sell complete m4 upper receiver,ar 7. Crafted with quality materials and covered by Radical’s lifetime warranty, this MIL-SPEC upper receiver provides an outstanding solution for any budget. COMPLETE 10. 300 Blackout Upper receivers so you can make your transition to this wonder-round. Complete Upper Receiver Assemblies. This pistol upper has the same level of quality and performance that you have come to expect from all of Gorilla MFG products Made In USA. We're not a huge corporation that values the bottom line more than their customers and we're not a one-man band selling AR15 parts out of a garage, we're big enough to compete and small enough that each customer matters. It is chambered in. 5 inch 300 Blackout AR-15 Side Charging Upper. 5 and 16 Inch 4150 Stainless Steel. AR15 Complete Firearms. 56 SSR7 Pistol Upper $ 499. You'll see our 300 Blackout (AKA: 300 BLK) Upper assemblies cater to every shooter.