AR 15 Pistol Kit - .300 AAC Blackout (10.5" Phosphate Barrel & 12" Slanted M-Lok Handguard) w/ 80% Lower



When you want to hit the broad side of a barn, they say you grab a Kalashnikov. When you to remove the barn doors, they say you grab an black rifle chambered in big ole' 300 Blackout. We put together this hand cannon of an AR-15 kit to maximize light and heavy .300 BLK loads, allowing you to take down targets, hogs, and bumps in the night with extreme prejudice. This AR kit comes with the perfect upper configuration: A 10.5" phosphate-coated, cold-forged barrel made from 4150 CMV (the best gun steel on the market), a 12" slant M-Lok handguard, an M4 forged upper, an M16 BCG, and a pistol gas system. Together, this upper will handle any loads and provide MOA accuracy for thousands of rounds. You also get a lower parts kit with a sexy polished trigger and comfy Magpul grip. Out back, a high-speed SB Tactical pistol brace and full buffer system complete the kit. Just pair this kit with an optional billet or forged 80% lower receiver and jig, and you can hit the range in a single afternoon! The included upper ships pre-built and test-fired. Like all our products, this kit is backed by a Lifetime Warranty.

300 Blackout Pistol Kit Specs:

Barrel Length: 10.5"

Barrel Profile: A2

Gas System: Pistol-length

Barrel Steel: 4150 Chromoly Vanadium

Barrel Finish: Phosphate 

Chrome Lining: No

Muzzle Thread: 5/8-24

Chamber: 300 Blackout

Twist Rate: 1:8

Barrel Extension: M4

Diameter at Gas Block: .750

Gas Block Type: Low-profile

Muzzle Device: PSA Fluted Flash Can

Receiver Material: Forged 7075 T6 Aluminum

Receiver Type: M4

Handguard Type: PSA 12" Slant End M-Lok Rail

Bolt Carrier Group Included: Yes

Bolt Steel: Carpenter 158

Bolt Carrier Profile: Full-auto

Charging Handle Included: Yes

Overall Length: 21"

300 Blackout Pistol Kit Features:

  • Includes all parts needed to complete build
  • Optional forged or billet 80% lower
  • Upper ships pre-built and test-fired
  • Enhanced, polished trigger for reliability
  • Not considered a firearm, no FFL required
  • Proudly built in the U.S.A.
No FFL required  Made in the USA  Lifetime Warranty

Shipping Restrictions

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 or “assault weapons” (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 or machining a firearm. We try our best to keep our shipping page current, but laws change daily only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.