AR 15 Pistol Kit - .300 AAC Blackout (7.5" Nitride Barrel & 9" M-Lok Handguard) w/ 80% Lower



300 Blackout is perfect for up-close-and-personal shooting, and medium-range work at the range. It packs plenty of power in a compact package. That's why we parted together this full 7.5" AR-15 kit. Chambered in .300 BLK, this kit features a 4150 CMV heavy barrel with a nitride finish, a 1:7 twist rate, a forged M4 upper, and an M16 BCG with pistol gas. Tack on your favorite accessories thanks to the 9" M-Lok handguard! You also get a lower parts kit with an enhanced and polished trigger, and an upgraded to the Magpul MOE grip. A complete buffer tube assembly is paired with a pistol brace by SB Tactical to round out the kit. Just grab a billet or forged 80% lower, and you'll have all the parts you need to complete the kit in a single day!

300 Blackout Pistol Kit Specs:

Upper Receiver Type: Forged Standard

Upper Receiver Material: 7075 T6 Aluminum

Upper Receiver Coating: Hardcoat Anodized

Muzzle Device: Fluted Flash Can

Barrel Caliber: 300 Blackout

Barrel Profile: Heavy

Barrel Material: 4150 Chromoly Vanadium

Barrel Length: 7.5"

Barrel Thread Pitch: 5/8 x 24

Barrel Twist Ratio: 1:7

Barrel Finish: Nitride

Barrel Lining: Nitride 

Gas Block Size: .750

Gas Block Type: Low Profile

Gas System: Pistol

Handguard Length: 9"

Handguard Type: M-LOK

Handguard Color: Black

Rail Profile: Lightweight

BCG Caliber: 5.56

BCG Profile: Full Auto

BCG Finish: Phosphate

BCG Testing: MP

BCG Logo: None

BCG Bolt Type: Carpenter 158

Charging Handle: 7075 T6 Aluminum

 300 Blackout Pistol Kit Features:

  • Includes all parts needed to complete your build
  • Requires no FFL, not considered a firearm
  • Pre-built upper ships ready to fire
  • Ships straight to your front door
  • Proudly built in the USA
  • Backed by Lifetime Warranty

300 Blackout Pistol Kit Details:

Barrel: Nitride-coated, 7.5”, chambered in .300 AAC Blackout. Made of 4150 Chromoly Vanadium. Features 1:7 twist rate, M4 barrel extension, and pistol-length gas system. Includes 9" lightweight M-Lok free-float rail, .750" diameter low profile gas block, and fluted flash can.

Upper: Mil-spec, made of forged 7075 T6 aluminum. Hard-coat anodized (Type III). Features M4 feed ramps.

Bolt: Mil-spec, shot-peened, made of Carpenter 158 steel. Gas key secured with Grade 8 fasteners, staked per mil-spec. Parkerized exterior, chrome-lined interior.

80% Lower: Pick an optional forged or billet 80% lower. All lowers include mil-spec fittings and hard-coat anodizing.

Lower Parts Kit: Includes complete, mil-spec AR-15 parts kit. Features Enhanced Polished Trigger (EPT).

Charging handle: Standard 7075 Forged charging handle.

Please note: If completing your AR Pistol Kit using the optional 80% lower, please select an 80 lower jig from our available options.

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.