AR 15 Pistol Kit - .300 AAC Blackout (7.5" Nitride Barrel & 7" M-Lok Handguard) w/ 80% Lower



300 Blackout: If you wanna build a close-range hand cannon that'll put a hole in just about anything, you've found the right kit. This AR-15 Build Kit sports a heavy-barreled 7.5" upper forged from 4150V gun steel - the same stuff the U.S. Army loves. Inside, a full-auto M16 BCG goes to work with a pistol gas system, reliably cycling any light or heavy loads. Just swap the magazine and keep burning brass.

This kit also comes with a forged M4 upper with plenty of rail space for your favorite optics and irons. You also get a lower parts kit with an upgraded Magpul MOE grip and polished trigger, a complete buffer tube assembly with a pistol brace by SB Tactical, and your choice of one of our forged or billet 80% lower receivers! Pair with a jig and get your build kit finished in a single afternoon. Then, just hit the range!

300 Blackout Pistol Kit Specs:

Barrel Length: 7.5"

Gas System: Pistol Length

Barrel Profile: Heavy

Barrel Steel: 4150V 

Barrel Finish: Phosphate

Chrome Lining: None

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: 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:

  • Includes everything you need to complete your build
  • Ships to your front door with no FFL or paperwork
  • Heavy barrel and EPT Parts Kit provide sub-MOA accuracy
  • Pre-built upper removes the guesswork of assembly
  • Made in the U.S.A., backed by a Lifetime Warranty

300 Blackout Pistol Kit Details:

Barrel: Phosphate-coated, 7.5”, chambered in .300 AAC Blackout. Features 1:8 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 an 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: Includes an optional forged or billet 80% lower. Each lower features a mil-spec, hard-coat anodized finish and mil-spec fittings.

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

Charging handle: Standard 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.