300 AAC Upper Assemblies

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  • AR-15 300 AAC Blackout 16" Diamond "Predator" Upper Assembly
    AR-15 300AAC Blackout 16" Diamond "Predator" Upper Assembly. Created by Moriarti Armaments. CA and NY compliant.Action: Semi-auto Gas System: Carbine Length Gas System Chamber: 300 Blackout Twist Rate: 1/8 button rifled Barrel: 16" heavy barrel, 4150V s..
    AR-15 300AAC Blackout 16" Diamond "Predator" Upper Assembly. Create...
    $249.95$399.95
  • AR-15 300 AAC BLK 10.5" Nitro-Met Quad Upper Assembly with Socom Style Brake
    AR-15 300 AAC BLK 10.5" Nitro-Met Quad Upper Assembly with Socom Style Brake -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:Chamber - 300 AACBarrel Twist - 1x7Barrel Thread -..
    AR-15 300 AAC BLK 10.5" Nitro-Met Quad Upper Assembly with Socom St...
    $249.95$399.95
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  • AR-15 300 AAC BLK 7.5" KEYMOD UPPER ASSEMBLY WITH FLASH CONE
    AR-15 300 AAC BLK 7.5" KEYMOD UPPER ASSEMBLY WITH FLASH CONEAction: Semi-auto Gas System: Pistol Length Gas System Chamber: 300 AAC Twist Rate: 1/7  Muzzle Device: Flash Cone Can    Barrel: 7.5" 300 AAC M4 hbar contour, phosphate finish, heat tr..
    AR-15 300 AAC BLK 7.5" KEYMOD UPPER ASSEMBLY WITH FLASH CONEAction:...
    $249.95$349.95
  • AR-15 300AAC Blackout 16" Spiral "Black Shark" Upper Assembly
    AR-15 300AAC Blackout 16" Spiral "Black Shark" Upper Assembly. Created by Moriarti Armaments. CA and NY compliant.Action: Semi-auto Gas System: Carbine Length Gas System Chamber: 300 Blackout Twist Rate: 1/8 button rifled Barrel: 16" heavy barrel, 4150V..
    AR-15 300AAC Blackout 16" Spiral "Black Shark" Upper Assembly. Crea...
    $249.95$399.95
  • AR-15 16" 300 AAC BLACKOUT NITRIDE 15" LIGHTWEIGHT MLOK UPPER
    AR-15 16" 300 AAC BLACKOUT PISTOL LENGTH 1/8 NITRIDE 15" LIGHTWEIGHT KEYMOD UPPER. 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! Just drop an upper on your standard mil-spec AR-15 lower, and y..
    AR-15 16" 300 AAC BLACKOUT PISTOL LENGTH 1/8 NITRIDE 15" LIGHTWEIGH...
    $289.95$349.95
  • AR-15 16" 300 AAC BLACKOUT STAINLESS UPPER WITH THREAD PROTECTOR
    AR-15 16" 300 AAC BLACKOUT STAINLESS UPPER WITH THREAD PROTECTOR. New by Moriarti Armaments, CA and NY compliant. 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! Just drop an upper on your stand..
    AR-15 16" 300 AAC BLACKOUT STAINLESS UPPER WITH THREAD PROTECTOR. N...
    $249.95$349.95
  • AR-15 300 AAC 16" KEYMOD UPPER ASSEMBLY WITH SLIP OVER BARREL SHROUD
    AR-15 300 BLACKOUT 16" M4 KEYMOD UPPER ASSEMBLY WITH SLIP OVER BARREL SHROUD CA and NY compliant.Action: Semi-autoGas System: Carbine Length Gas SystemChamber: 300 AACTwist Rate: 1/8, button rifledMuzzle Device: Slip over barrel shroud with multi port muzzle brake, 5/8X24Barrel:&nb..
    AR-15 300 BLACKOUT 16" M4 KEYMOD UPPER ASSEMBLY WITH SLIP OVER BARR...
    $249.95$399.95
  • AR-15 300 AAC blackout 10.5" nitride classic keymod upper assembly
    AR-15 300 AAC blackout 10.5" classic keymod upper assembly is a perfect addition to your AR pistol. No other modifications to your AR-15 is required. Uses standard AR-15 BCG. All you need is 300 BLK ammo and this upper - and you have a new AR. The 10.5" 300 BLK upper includes:Barrel - 10.5" heavy co..
    AR-15 300 AAC blackout 10.5" classic keymod upper assembly is a per...
    $229.95$399.95
  • AR-15 300 AAC blackout 16" stainless steel "Eagle Claw" complete upper assembly
    AR-15 300 AAC blackout 16" stainless steel "Eagle Claw" complete 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 hbar contour bar..
    AR-15 300 AAC blackout 16" stainless steel "Eagle Claw" complete up...
    $399.95$429.95
  • AR-15 300 AAC blackout 16" stainless steel black diamond fluted upper assembly
    AR-15 300 AAC blackout 16" stainless steel black 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 hbar contour barr..
    AR-15 300 AAC blackout 16" stainless steel black diamond fluted upp...
    $399.99$449.95
  • 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 hbar contour barrel. Hardened to 26..
    AR-15 300 AAC 16" BLACKOUT STAINLESS STEEL DIAMOND FLUTED UPPER ASS...
    $499.95
  • 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 releived. ..
    AR-15 300 AAC Blackout 16" stainless steel spiral fluted tacti...
    $449.95$499.95
  • AR-15 300 AAC blackout 16" stainless straight fluted tactical upper assembly
    AR-15 300 AAC blackout 16" stainless steel straight fluted tactical 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! Just drop an upper on your standard mil-spec AR-15 lower, and ..
    AR-15 300 AAC blackout 16" stainless steel straight fluted tactical...
    $349.99$399.95
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  • AR-15 300 AAC blackout 9" keymod pistol upper assembly
    AR-15 300 AAC blackout 9" keymod pistol upper assemblyBARREL - 9" 4150V PARKERIZED HBAR/HEAVY CONTOUR BARREL. HARDENED TO 26-32 RC AND STRESS RELEIVED.  CHAMBERED IN 300 BLACKOUT. 1/7 RH TWIST. PISTOL GAS SYSTEM .750 UNDER GAS BLOCK. BARREL IS FINISHED OFF WITH A SLIM FLASH CAN AND CR..
    AR-15 300 AAC blackout 9" keymod pistol upper assemblyBARREL -...
    $349.95$399.95
  • AR-15 300 AAC BLK 16" stainless steel black spiral upper assembly
    AR-15 300 AAC blackout 16" stainless steel black spiral 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 hbar contour barre..
    AR-15 300 AAC blackout 16" stainless steel black spiral fluted uppe...
    $399.99$429.95