Build the ultimate AR Pistol using our new 300 Blackout Pistol Kit. The included heavy-profile 10.5” barrel maximizes velocity for exceptional accuracy at medium ranges when using supersonic loads. The muzzle ships with 5/8-24 threads so you can easily install your favorite suppressor and work with subsonic loads. An enhanced, polished trigger rounds out the kit with a mil-spec parts kit that guarantees you get a slick, reliable shooter right out of the box.
The free-float 9” M-Lok handguard makes adding your favorite accessories a breeze, while offering lightweight maneuverability. This upper ships pre-built and test-fired to guarantee reliable accuracy and functionality. Select an optional forged or billet 80% lower to complete the kit, and put it all together in one day!
300 Blackout Pistol Kit Specs:
Barrel Length: 10.5″
Barrel Profile: A2
Barrel Steel: 4150 Chromoly Vanadium
Barrel Finish: Nitride
Chrome Lining: No
Muzzle Thread: 5/8-24
Chamber: 300 AAC Blackout
Twist Rate: 1:8
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: Low-profile
Muzzle Device: A2 Style Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: A3
Handguard Type: Lightweight M-Lok 9″ Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 19.5″
300 Blackout Pistol Kit Features:
- Complete AR pistol-in-a-box (w/ 80% lower)
- No FFL required, kit isn’t considered a firearm
- Upper ships pre-built and test-fired for quality
- Optional mil-spec forged or billet 80% lower
- Includes enhanced polished trigger assembly
- Ships straight to your front door
- Backed by Lifetime Warranty
- Proudly made in the U.S.A.
300 Blackout Pistol Kit Details:
Barrel: Nitride-coated, 10.5”, chambered in 300 Blackout. Made of 4150 Chromoly Vanadium. Features 1:8 twist rate, M4 barrel extension, and pistol-length gas system. Includes 9″ Lightweight M-Lok free-float handguard, .750″ diameter low profile gas block, and A2 flash hider.
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 MOE trigger guard and 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.
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
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.