300 AAC Blackout

From its humble origins in the U.S. military, the 300 Blackout has grown in popularity as more customers recognize its versatility and extreme performance. Moriarti Arms ® offers a wide variety of AR builds, assemblies, parts and more, chambered in the versatile 300 blackout cartridge

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  • AR-15 300 AAC 14.5" Blackout Ballistic Advantage keymod tactical pistol kit
    AR-15 300 AAC 14.5" Blackout Ballistic Advantage keymod tactical pistol kit. This kit contains all components to complete your AR-15 300 BLK build. The kit comes WITHOUT 80% lower receiver. All options and modifications to your kit are available on top of this page.  All components are Mil Spec..
    AR-15 300 AAC 14.5" Blackout Ballistic Advantage keymod tactical pi...
    $429.95$549.95
  • AR-15 300 AAC BLK 10.5" Nitro-Met Keymod Upper Assembly with Socom Style Brake
    AR-15 300 AAC BLK 10.5" Nitro-Met Keymod 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 Keymod Upper Assembly with Socom ...
    $249.95$399.95
  • 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 GEN 2 NITRIDE 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, 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 Noveske KX5 Flash Suppressor Pig Black 5/8x24
    AR 5/8x24 Noveske KX5 Flash Suppressor Pig Black. Made in Grants Pass,Oregon USA. Heat-Treated CM Construction  Nitride Finish  4.5 ounces  1.2 inch Dia  3.25 inch OAL  This KX5 may be used on:  .308, 300 BLK, 6.8 SPC, 7.62mm = 5/8x24 The Noveske KX5..
    AR 5/8x24 Noveske KX5 Flash Suppressor Pig Black. Made in Grants Pa...
    $169.95
  • AR SlimLine MicroCone Flash 5/8x24
    AR SlimLine MicroCone Flash 5/8x24Solid T6 Aluminum Body 5/8 x 24 Thread .308/ 300 AAC Blackout Cal Pushes Flash Forward Micro VersionMade in USA ..
    AR SlimLine MicroCone Flash 5/8x24Solid T6 Aluminum Body 5/8 x...
    $49.95