Product Details

.300 Blackout Rifle Kit

.300 Blackout Rifle Kit, 16”Phosphate Barrel 12” Quad Rail, With 80% Lower

5.00 out of 5 based on 1 customer rating
(1 customer review)



SKU: SKU-409 Category: Tag:



If you’re building your own  rifle kit is a great option. The upper and lower receivers in this rifle kit are black hardcoat anodized. All AR-15 parts offered online at Thunder Tactical are machined to mil spec tolerances. Proper cycling is ensured because we test fire all fully assembled uppers.

This AR-15 rifle kit for sale is great for the gunsmith looking for a little bit of a longer barrel. The AR-15 parts included in the assembled .223/5.56 upper include the following:

  • .300 Blackout 12″ Barrel Phosphate,
  • 12″ Quad Rail
  • Carbine Length Gas Tube
  • Low pro gas block
  • Forward Assist
  • Ejection Port Cover
  • Charging Handle
  • M-16 Bolt Carrier Group
  • A2 Flash Hider with Crush Washer

Also included in this rifle kit are an 80 percent lower receiver, a six-position stock with buffer, buffer tube, and spring, and a lower parts kit to complete your lower. Keep shopping our gun parts online to discover what else we have to offer among our selection of pistol and rifle parts.

  • Available assembled or unassembled
  • Black hard coat anodized upper & lower

*This is not a complete receiver and still requires machining to be done.

Additional information

Weight 14 lbs

Assembled, Unassembled

1 review for .300 Blackout Rifle Kit, 16”Phosphate Barrel 12” Quad Rail, With 80% Lower

  1. Jackson M.

    Very good quality kit. All parts are solid and shipping was very quick!

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