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  • AR-15 300 BLK 300 BLK 5" PISTOL HYBRID UPPER ASSEMBLY / SPITFIRE/ MLOK RAIL / Left Hand
    AR-15 300 BLK 300 BLK 5" PISTOL HYBRID UPPER ASSEMBLY / SPITFIRE/ MLOK RAIL / Left Hand -is a perfect addition to your AR-15 build. All you need is a case of ammo to change your standard AR 5.56 to a new 300 Blackout upper.Assembly Features:OVERALL LENGTH: 15"PLATFORM: AR-15CHAMBER: 300 BLKBARREL MA..
    AR-15 300 BLK 300 BLK 5" PISTOL HYBRID UPPER ASSEMBLY / SPITFIRE/ M...
    $449.95$549.95
  • AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Cone / Mlok Rail
    AR-15 300 BLK 5" Pistol Hybrid Mlok Upper Assembly Includes: WEIGHT: 2.5 LbsOVERALL LENGTH: 15"PLATFORM: AR-15CHAMBER: 300 BlackoutBARREL MATERIAL: 4150 CRMOV BARREL LENGTH: 5"BARREL FINISH:  BLACK NITRIDETWIST RATE: 1/7MUZZLE THREAD: 5/8 - 24MUZZLE DEVISE: MORIARTI FLASH CONEHA..
    AR-15 300 BLK 5" Pistol Hybrid Mlok Upper Assembly Includes: ...
    $279.95$399.95
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  • AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail
    AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail Includes: WEIGHT: 2.5 LbsOVERALL LENGTH: 15"PLATFORM: AR-15CHAMBER: 300 BLKBARREL MATERIAL: 4150 CRMOV BARREL LENGTH: 5"BARREL FINISH:  BLACK NITRIDETWIST RATE: 1/7MUZZLE THREAD: 5/8X34MUZZLE DEVISE: SPITFIREHAN..
    AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail...
    $299.95$449.95
  • AR-15 300 BLK 7.5" Stainless Upper Assembly / Sound Forwarder / Mlok / 1x7
    AR-15 300 BLK 7.5" Stainless Upper Assembly / Sound Forwarder / Mlok / 1x7 Includes:PLATFORM: AR-15CHAMBER: 300 BLKBARREL MATERIAL: 416RBARREL LENGTH: 7.5"BARREL FINISH:  STAINLESSTWIST RATE: 1/7MUZZLE THREAD: 5/8X24MUZZLE DEVISE: SOUND FORWARDER, SILVER ANODIZED ALUMINUMHANDGUARD: 7" M-LO..
    AR-15 300 BLK 7.5" Stainless Upper Assembly / Sound Forwarder / Mlo...
    $299.95$449.95
  • BAD-CSS VERT® Stock System - 5.56 NATO/300 BLK
    BAD-CSS VERT® STOCK SYSTEMFEATURES:M16 BCG Compatible No Proprietary Bolt Carrier Group Required! - 9MM Version Compatible with most 9MM blow-back Bolt Carrier Groups (i.e. QC10, NFA, FAXON, etc.) Continuous Cheek Rest for Stable ShootingInterchangeable Cheek Rest (different colors/pattern..
    BAD-CSS VERT® STOCK SYSTEMFEATURES:M16 BCG Compatible No Proprietar...
    $399.95
  • AR .300 BLK 16" PISTOL LENGTH 1:8 TWIST / 12" MLOK / TRIPORT
    Barrel Length: 16"Gas System: PistolBarrel Steel: 4150V Chrome Moly VanadiumBarrel Finish: PhosphateMuzzle Thread: 5/8-24Chamber: 300 BlackoutTwist Rate: 1 in 8"Barrel Extension: M4Diameter at Gas Block: .750"Gas Block Type: Low-profile steelMuzzle Device: Triport Muzzle BrakeReceiver Material: Forg..
    Barrel Length: 16"Gas System: PistolBarrel Steel: 4150V Chrome Moly...
    $229.95$349.95
  • AR-10 / AR-15 STAINLESS STEEL MULTI PORT COMPENSATOR, 5/8x24
    AR GEN 2 STAINLESS STEEL MULTI PORT COMPENSATOR, 5/8x24 (AR-10, 300BLK, 7.62X39)Multi Port CompensatorFlat side, tanker style3 Side Porting Slots and 2 Top Porting Holes To Reduce Muzzle Climb And RecoilCrush Washer IncludedAll Steel Construction, Stainless Steel.308 Cal / 300 AAC Blackout / 7.62x39..
    AR GEN 2 STAINLESS STEEL MULTI PORT COMPENSATOR, 5/8x24 (AR-10, 300...
    $89.95
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  • AR-15 .300 BLK 16" PISTOL UPPER ASSEMBLY /15" MLOK / CERAKOTE & CHOOSE
    AR-15 .300 BLK 16" PISTOL LENGTH 1:8 TWIST / 15" MLOK / CERAKOTE & CHOOSE COLOR ON TOP OF PAGE. This drop-in 300 Blackout upper will attach to virtually any standard AR-15 lower assembly. Includes:Barrel - 16" 4150 CMV, 1x8 twist, pistol length gas system. Phosphate finish. Chambered in 300..
    AR-15 .300 BLK 16" PISTOL LENGTH 1:8 TWIST / 15" MLOK / CERAKOTE &a...
    $449.95
  • AR-15 / AR-10 NITRIDE STEEL MULTI PORT COMPENSATOR, 5/8x24
    Multi Port CompensatorFlat side, tanker style3 Side Porting Slots and 2 Top Porting Holes To Reduce Muzzle Climb And RecoilCrush Washer IncludedAll Steel Construction, Black Nitride Coated.308 Cal / 300 AAC Blackout / 7.62x395/8 x 24 ThreadsUSA made ..
    Multi Port CompensatorFlat side, tanker style3 Side Porting Slots a...
    $89.95
  • AR-15 300 AAC Blackout 10.5" pistol kit - 7" MLOK / SBA3 /MULTIPORT
    AR-15 300 AAC Blackout 10.5" pistol kit - 7" MLOK / SBA3 /MULTIPORT contains all components to complete your AR-15 build EXCEPT 80% stripped lower receiver .  All components are Mil Spec and made in the USA. Our handguards are free float.  Barrel: 10.5” Heavy Barrel, 41V50 Par..
    AR-15 300 AAC Blackout 10.5" pistol kit - 7" MLOK / SBA3 /MULTIPORT...
    $449.95$799.95
  • AR-15 300 AAC Blackout 10.5" pistol kit - MLOK / SBA3 /NO BCG
    AR-15 300 AAC Blackout 10.5" pistol kit - MLOK / SBA3 /NO BCG contains all components to complete your AR-15 build EXCEPT 80% stripped lower receiver and BCG.  All components are Mil Spec and made in the USA. Our handguards are free float.  Barrel: 10.5” Heavy Barrel, 41V50 Pa..
    AR-15 300 AAC Blackout 10.5" pistol kit - MLOK / SBA3 /NO BCG conta...
    $329.95$699.95
  • AR-15 300 AAC Blackout 10.5" Pistol Kit / Quadrail / Classic
    AR-15 300 AAC Blackout 10.5" quadrail tactical pistol kit contains all components to complete your AR-15 build. The kit comes WITHOUT 80% stripped lower receiver.  All options and modifications to your kit are available on top of this page.  All components are Mil Spec and made i..
    AR-15 300 AAC Blackout 10.5" quadrail tactical pistol kit cont...
    $369.95$549.95
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  • AR-15 300 AAC Blackout 16" M4 classic tactical rifle kit / quadrail
    AR-15 300 AAC 16" blackout M4 classic tactical rifle kit, AR-15 Mil Spec Lower Parts Kit. This rifle kit contains all components to complete your AR-15 Rifle. The rifle kit comes WITHOUT 80% lower receiver. All options and modifications to your kit are available on top of this page. All co..
    AR-15 300 AAC 16" blackout M4 classic tactical rifle kit, AR-1...
    $349.95$529.95
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  • AR-15 300 AAC blackout 16" M4 Rifle Kit / 15" Mlok / Adaptive Stock
    AR-15 300 AAC blackout 16" M4 Rifle Kit / 15" Mlok / Adaptive Stock.  AR-15 Mil Spec Lower Parts Kit. This rifle kit contains all components to complete your AR-15 Rifle. The rifle kit comes WITHOUT 80% lower receiver. All options and modifications to your kit are available on top of ..
    AR-15 300 AAC blackout 16" M4 Rifle Kit / 15" Mlok / Adaptive Stock...
    $349.95$549.95
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  • AR-15 300 AAC BLACKOUT 16" STAINLESS STEEL DIAMOND FLUTED UPPER ASSEMBLY
    AR-15 300 AAC 16" BLACKOUT STAINLESS STEEL DIAMOND FLUTED UPPER ASSEMBLY, 300 blackout caliber uppers use your standard .223/5.56 bolt carrier group and magazines! No special bolts or magazines to buy to get into a new caliber!Barrel - 16" 416 stainless steel h-bar contour barrel. Hardened to 2..
    AR-15 300 AAC 16" BLACKOUT STAINLESS STEEL DIAMOND FLUTED UPPER ASS...
    $399.95$499.95
  • AR-15 300 AAC BLACKOUT 16" Stainless Steel Diamond Fluted Upper Receiver, Left Hand
    AR-15 300 AAC BLACKOUT 16" stainless steel diamond fluted upper assembly, Left Hand. This is a perfect upgrade to your AR-15 Rifle. 300 blackout caliber uppers use your standard .223/5.56 bolt carrier groups and magazines! No special bolts or magazines to buy to get into a new caliber!Barrel&nb..
    AR-15 300 AAC BLACKOUT 16" stainless steel diamond fluted uppe...
    $499.95$529.95
  • AR-15 300 AAC Blackout 16" stainless steel spiral fluted tactical upper assembly
    AR-15 300 AAC Blackout 16" stainless steel spiral fluted tactical upper assembly. 300 Blackout chamber uses AR-15/M16 BCG and standard AR-15 mags. The upper features:Barrel - 16" 416 stainless steel hbar contour barrel with x-treme spiral fluting. Hardened to 26-32 rc and stress relived.  ..
    AR-15 300 AAC Blackout 16" stainless steel spiral fluted tacti...
    $399.95$499.95
  • AR-15 300 AAC blackout 16" stainless straight fluted upper assembly, Left Hand
    AR-15 300 AAC blackout 16" stainless straight fluted upper assembly, Left Hand. Perfect addition for our Left Handed shooter to switch into 300 AAC caliber. Fits virtually all AR-15 lower receivers. All you need is the ammo, drop this upper onto your lower, and go out and have fun.Barrel - 16" 416 s..
    AR-15 300 AAC blackout 16" stainless straight fluted upper assembly...
    $429.95$449.95
  • AR-15 300 AAC Blackout 9" 4150 CMV  barrel 1-7 twist
    MADE FROM 4150 CMV AND HARDENED TO 26-32 RC AND STRESS RELIEVED, PLATED BLACK.  1-7 RH TWIST CHAMBERED IN 300 AAC BLACKOUT .750"DIAMETER UNDER GAS BLOCK CARBINE LENGTH GAS SYSTEM 5/8-24 THREAD FOR ATTACHING MUZZLE DEVICE COMES WITH BARREL EXTENSION AND EXTENSION PIN INS..
    MADE FROM 4150 CMV AND HARDENED TO 26-32 RC AND STRESS RELIEVED,...
    $154.95
  • AR-15 300 AAC BLK 16" Heavy barrel, Carbine, 1-8 twist
    Type: AR15Caliber: 300 AACTwist Rate: 1:8Thread Pitch: 5/8×24Finish: Black NitrideMaterial: 4150 CMVGas system: CarbineGas block diameter: 750M4 feedramps ..
    Type: AR15Caliber: 300 AACTwist Rate: 1:8Thread Pitch: 5/8×24Finish...
    $99.95$149.95
  • AR-15 300 AAC BLK 16" stainless steel straight fluted barrel 1-7 twist
    AR-15 300 blk 16" stainless steel straight fluted barrel 1-7 twist. This barrel has the gas port hole pre-drilled. Made from 416r stainless steel hardened to 26-32 rc and stress relieved. 1-7 rh twist. Chambered in 300 blackout. .750"diameter under gas block. Carbine length gas system. 5..
    AR-15 300 blk 16" stainless steel straight fluted barrel 1-7 twist....
    $189.95
  • AR-15 300 BLK 10.5" Walking Dead pistol upper assembly
    AR-15 300 BLK 10.5" Walking Dead pistol upper assembly   includes:Barrel - 10.5" 4150 CMV hbar/heavy contour barrel. Hardened to 26-32 rc and stress relived.  Chambered in 300 BLK. 1-8 rh twist rate, .750 under gas block. Barrel is finished off with black walking dead compensator and ..
    AR-15 300 BLK 10.5" Walking Dead pistol upper assembly   ...
    $249.95$399.95
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  • AR-15 300 BLK 5.5" COMPLETE COMPRESSION SERIES MICRO PISTOL KIT / NO LOWER
    Make it fun. Make it your own. This pistol kit contains all components to complete your AR-15 pistol, except 80 percent stripped lower receiver, available for purchase separately. AR-15 300 BLK 5.5" COMPLETE COMPRESSION SERIES MICRO PISTOL KIT INCLUDES: 5.5" 300 blk 1:7 Twist M4 4150 B..
    Make it fun. Make it your own. This pistol kit contains all compon...
    $469.95$799.95
  • AR-15 300 BLK 5.5" Moriarti Minimalist Series Semi Auto Pistol | SBA3 Brace
    AR-15 300 BLK 5.5" Moriarti Minimalist Series Semi Auto Pistol | SBA3 Adjustable Brace. FFL transfer item. Made in USA.Caliber: 300 BlackoutOperating System: Gas Impingement System – Semi-AutomaticReceiver: Moriarti A4 Type Flat Top Upper ReceiverLower Receiver: Moriarti Armaments for..
    AR-15 300 BLK 5.5" Moriarti Minimalist Series Semi Auto Pistol | SB...
    $599.95$999.95
  • AR-15 300 BLK 9" Chrome Moly Upper Assembly / Blue Mlok / Trident Cone
    AR-15 300 BLK 9" Chrome Moly Upper Assembly / Blue Mlok / Trident Cone. Handguard - 10" mlok slim profile forearm. Made from aircraft quality aluminum and blue hardcoat anodized.Barrel -  9" nitride (black) chrome lined barrel, 5/8x34 Threaded, 1x8 twist, Chrome Moly 4150, C..
    AR-15 300 BLK 9" Chrome Moly Upper Assembly / Blue Mlok / Trident C...
    $249.95$499.95
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  • AR-15 7.62x39 5.5" COMPLETE COMPRESSION SERIES MICRO PISTOL KIT / NO LOWER - CHOOSE COLOR
    Make it fun. Make it your own. This pistol kit contains all components to complete your AR-15 pistol, except 80 percent stripped lower receiver, available for purchase separately. AR-15 7.62x39 5.5" COMPLETE COMPRESSION SERIES MICRO PISTOL KIT INCLUDES: 5.5" 7.62X39 1:10 Twist M4 4150 ..
    Make it fun. Make it your own. This pistol kit contains all compon...
    $469.95$799.95
  • AR-15 Moriarti Duo TakeDown Pistol Upper Assembly | 5.56 Nato and 300 Blk Complete Combo
    AR-15 Moriarti Duo TakeDown Pistol Upper Assembly | 5.56 Nato and 300 Blk Complete Combo allows for easy and convenient way to interchange calibers without actually detaching receivers. Compatible with virtually any Mil-Spec pistol AR-15 lowers, this TakeDown Duo saves time and money by getting two ..
    AR-15 Moriarti Duo TakeDown Pistol Upper Assembly | 5.56 Nato and 3...
    $899.95$1,429.95
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  • AR-15 Moriarti Duo TakeDown Semi Auto Pistol | 5.56 Nato 10.5" and 300 Blk 7.5" |  SBA3
    AR-15 Moriarti Duo TakeDown Semi Auto Pistol | 5.56 Nato 10.5" and 300 Blk 7.5" | SBA3 allows for a quick detach of barrel assembly to easily and conveniently interchange calibers without actually detaching upper and lower receivers. Save time and money with this convenient duo!Build on a forged alu..
    AR-15 Moriarti Duo TakeDown Semi Auto Pistol | 5.56 Nato 10.5" and ...
    $1,199.95$1,749.95
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Everything You Need To Know about 300 Blackout Posted by on Apr 20, 2016.

We all love our AR15 platform. The most versatile and reliable ever. And with the new developments in the industry, we are constantly adding new calibers t.. more..