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.

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, Pennsylvania, 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.