300 Blackout AR 15 Pistol Kit (8.5” Nitride Barrel & 7” Lightweight M-Lok Handguard) w/ 80% Lower (1:7 Twist)

We’re excited to introduce this heavy-duty 300 Blackout AR 15 Pistol Kit. Featuring an 8.5” nitride barrel, 7” lightweight M-Lok handguard, complete parts kit, and your choice of a quality forged or billet 80% lower, this kit includes everything you need to finish your build and hit the range in a single day.

A heavy-profile, 4150V barrel provides MOA accuracy and reliably cycles supersonic or subsonic 300 BLK loads, suppressed or un-suppressed. A 1:7 twist rate allows for accurate shot groups with either heavy (220-grain) or light (110-grain) loads. A pistol-length gas system and 5/8-24 thread fittings making installing your favorite suppressor a breeze, no modification necessary.

300 Blackout Pistol Kit Specs:

Barrel Length: 8.5″
Gas System: Pistol Length
Barrel Profile: Heavy
Barrel Steel: 4150V 
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 5/8-24
Chamber: 300 Blackout
Twist Rate: 1:7
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: M4
Handguard Type: 7″ Lightweight M-Lok Free Float Rail
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-Auto
Charging Handle Included: Yes
Overall Length: 17″

300 Blackout Pistol Kit Features:

• Offers complete build kit w/ optional 80% lower
• Is not considered a firearm, no FFL required
• Pre-built upper is test-fired for reliability
• Features mil-spec fittings
• Type III Hardcoat anodized
• Proudly made in the USA
• Backed by Lifetime Warranty

 300 Blackout Pistol Kit Details:

Barrel: Nitride-coated, 8.5”, chambered in 300 Blackout. Made of 4150 Vanadium. Features 1:7 twist rate, M4 barrel extension, and pistol-length gas system. Includes 7″ Lightweight M-Lok free-float rail, .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.