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

(3 customer reviews)

from: $44243$43499

SKU: SKU-1091 Categories: , Product ID: 3862


Product Description

.300 Blackout Rifle Kit For The DIY Gunsmith

  • 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:

  • Upper Receiver
  • .300 Blackout 16″ Barrel Phosphate,
  • 15″ Quad Rail Handguard or 15″  Kemod Rail (choose from drop-down menu)
  • Low pro gas block
  • Carbine Length Gas Tube
  • Forward Assist
  • Ejection Port Cover
  • Charging Handle
  • M-16 Bolt Carrier Group
  • A2 Flash Hider with Crush Washer
  • 80% lower receiver,
  • six-position stock with buffer, buffer tube, and spring,
  • 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

Anodize Color Options

  • This kit comes  in the following colors:
    • Black Anodized
    • Green Anodized……….. extra
    • Red Anodized………….. extra
    • Blue Anodized………….. extra
    • Bronze Anodized……….. extra
    • Purple Anodized……… extra
    • Pink Anodized……… extra
    • *This is not a complete receiver and still requires machining to be done.

Additional information

Weight10.000 lbs


Handguard Rail



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3 reviews for .300 Blackout Rifle Kit, 16”Phosphate Barrel, With 80% Lower

  1. David H (verified owner)

    This was a great kit. I received it yesterday at 1pm and I completed the build by 5. I love the lower. Good grade aluminum and tolerances are tight, but not too tight if you make an error. Heading out later today to put a few hundred rounds thru her. Still waiting for parts on my other kit. There was a packing error. Wrong color and missing detents springs trigger guard and so forth.

  2. David H (verified owner)

    Put 100 rounds thru her and was solid. I love it! I WISH I HAD MY MISSING PARTS FOR MY PISTOL! Damn!
    Here is the build I did yesterday and fired off 100+ rounds.
    I can’t post the damn photo!!

  3. David H (verified owner)

    I got her dialed in with a dot at 150 yards. 1”group and will be my deer rifle. Absolutely love it and will be making another one for my kid.

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