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Rifle Build Kit (Complete) – 300 Blackout (16″ Barrel & 15″ M-Lok Handguard) AR15

This product has been discontinued.

Rifle Build Kit (Complete) - 300 Blackout (16" Barrel & 15" M-Lok Handguard) AR15
Rifle Build Kit (Complete) - 300 Blackout (16" Barrel & 15" M-Lok Handguard) AR15
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SKU: UA300CM41617(P)-(15)MLOK-BK


Looking for the quickest and easiest way to build a .300 AAC blackout AR-15 that’s both lightweight and affordable? This build kit comes with the finishing piece, ready to rock:  our complete 16″ rifle upper chambered in .300BLK with 15″ M-LOK skeletonized handguard, BCG, and charging handle. This featherweight .300 blackout upper offers superior accuracy with plenty of rail space for mounting front sights and other accessories. Some serious aesthetics are a plus with its unique skeletonized handguard.

This pre-built upper assembly features a mil-spec type III hard-coat anodized finish with a classic, mil-spec M4 flat top upper receiver. M4 feed ramps ensure reliability, and a picatinny rail provides mounting for any standard optic or rear sight. Forged from 7075 T6 aluminum, this upper’s as durable as any black rifle gets. Inside you’ll find a quality, black nitride-coated bolt carrier group made of 9130 steel with chrome-lined gas key and standard charging handle. This kit comes complete with everything needed to build your own .300 blackout rifle

Your AR-15 Rifle Kit Includes:

  • Barrel – 16” Carbine-length, parkerized chrome moly vanadium steel chambered in .300 AAC blackout with a 1:7 twist rate (included & installed)
  • Upper Receiver – Forged 7075 aluminum (included & installed)
  • 15″ M-Lok free float handguard (included & installed)
  • Bolt Carrier Group (included & installed)
  • .750” Low-Profile Gas Block (included & installed)
  • Gas Tube (included & installed)
  • A2 Birdcage Flash Suppressor (included & installed)
  • Charging Handle (included & installed)
  • Butt Stock & Buffer Tube Assembly (included)

Choose Your 80% Lower:

  • 7075 T6 forged aluminum
  • 6061 Premium billet aluminum
  • No lower optional

AR-15 Rifle Kit Details (Expanded):

Upper Assembly: This upper receiver is Forged from 7075 – T6 aluminum and is hard coat anodized black for durability. Featuring M4 feed ramp cuts, these upper receivers are made in the USA.  The upper assembly comes to you pre-assembled and ready to go.  Simply mount it onto your completed lower assembly, and add the backup sights of your choice.  Its barrel is chambered in .300BLK.

80% Lower Receiver: This kit comes with your choice of either a forged or a billet fire and safe-engraved black 80% lower. Alternatively, choose the “No lower” option if you already have your lower picked out.  Our lower receivers are already anodized to match the upper receiver assembly perfectly. The 80% lower is ready for you to mill the trigger pocket and drill the holes for the trigger pins and safety selector.

Please note: This AR-15 build kit requires that the builder complete the 80% lower receiver themselves, but that’s the rewarding part of the experience (and the only way to build your own AR-15 without the need of an FFL transfer or serialization).

No FFL required Made in the USA Lifetime Warranty

Shipping Restrictions only ships within the United States. Federal legislation dictates we cannot ship our products internationally. Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website.
We try our best to keep our shipping page current, but laws change daily. 

Rifle Build Kit (Complete) – 300 Blackout (16″ Barrel & 15″ M-Lok Handguard) AR15

$650.00 $550.00 (You Save $100.00)

Out of stock

$600.00 $500.00 (You Save $100 )
SKU: UA300CM41617(P)-(15)MLOK-BK Categories: , ,

This product has been discontinued.


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