Get serious about your home defense by upgrading from either .223 or 5.56mm to .300 AAC Blackout. And then once you've made the decision, do it with this AR pistol build kit. It's known that the .300BLK caliber loves shorter barrels and barrels with attached suppressors. Use it to protect your home without going deaf.
This kits gets you everything you need. Of course this build kit starts with your choice of forged, billet, or no 80% lower receiver. You also get a prebuilt upper assembly made with an 8.5-inch barrel coupled with a 7-inch MLOK handguard. Included in the kit is SB Tactical's SBA3 adjustable pistol brace and a lower parts kit to finish it off. The only things you'll need are mags and ammo, and the backup sights or optics of your choice.
AR-15 Pistol Build Kit Specs:
Barrel Length: 8.5″
Barrel Steel: Chrome Moly Vanadium
Barrel Finish: Phosphate
Muzzle Thread: 5/8 x 24
Chamber: .300 AAC Blackout
Twist Rate: 1:8
Muzzle Device: A2 Flash Hider
Receiver Material: 7075 T6 Forged Aluminum
Receiver Type: M4
Handguard Type: 7” Lightweight M-Lok
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Charging Handle Included: Yes
AR-15 Pistol Build Kit Features:
- Complete build kit w/ optional lower
- Includes pre-built .300BLK AR upper
- High-quality CMV barrel for accuracy
- Features enhanced, polished trigger
- Not considered a firearm, no FFL required
- Proudly built in the U.S.A.
- Backed by Lifetime Warranty
Barrel: Phosphate-coated, 8.5”, chambered in .300BLK. Made of 4150 CMV steel. Heat-treated. Features 1:8 twist rate. Includes 7” M-Lok handguard, and A2 flash hider.
Upper: Made of 7075 T6 forged aluminum. Hard-coat anodized (Type III).
Bolt: Heat-treated. Nitride finish. Carpenter 158 steel. Full auto profile.
80% Lower: Complete with optional AR-15 80% lower. Mil-spec fittings. Type III Hardcoat anodized finish.
Lower Parts Kit: Mil-spec AR-15 lower parts kit. Enhanced, polished trigger (EPT). Six-position buffer tube. SB Tactical Pistol Brace. Magpul MOE grip. Carbine buffer spring and pistol buffer.
Charging Handle: Standard AR-15 charging handle.
Please note: If completing your AR-15 build using the optional 80% lower, please select an AR-15-compatible 80% jig from the available options on our website.
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.