This full build kit provides all components needed to complete a 300 BLK AR-15 build except the lower receiver. It includes an 8.5 inch parkerized barrel with pistol gas system, 7 inch M-Lok freefloat handguard, complete bolt carrier group, charging handle, buffer system, lower parts kit, and Gauntlet Arms stabilizing brace. The upper receiver is forged 7075-T6 aluminum with anodized finish. The barrel is 4150 Chrome Moly Vanadium with 1 in 8 twist rate and 5/8x24 threads.
This kit includes the upper assembly, bolt carrier group, charging handle, buffer tube assembly with pistol buffer and spring, lower parts kit, and stabilizing brace. All components required to complete an AR-15 pistol build are provided except the lower receiver.
The 8.5 inch barrel features a parkerized finish for corrosion resistance and surface hardness. The pistol gas system is matched to the barrel length for reliable cycling. The micro low profile gas block sits under the handguard for a clean profile.
The 7 inch handguard provides M-Lok attachment slots for modular accessory placement. The freefloat design isolates the barrel from contact with the handguard. The 6061-T6 aluminum construction maintains a lightweight profile.
The polymer stabilizing brace is paired with a pistol buffer tube assembly. The buffer system includes a heavy duty pistol buffer tube, buffer, recoil spring, castle nut, and end plate for complete installation.
Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
Caliber: .300 Blackout
Barrel: 8.5" .300 Blackout AR-15 Heavy Barrel
Barrel Length: 8.5"
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Finish: Parkerized
Barrel Thread Pitch: 5/8x24
Barrel Profile: Heavy
Barrel Twist Rate: 1:8
Barrel Gas System Length: Pistol
Handguard Material: 6061-T6 Aluminum
Handguard Length: 7-inch
Handguard Color: Black
Handguard Style: M-Lok
Gas Block: Micro Low-Profile Gas Block, .750 O.D Barrel Steel
Gas Block Size: 0.75
Muzzle Device: AR-15/AR-10 .308 5/8x24 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
Upper Receiver: AR-15 Upper Receiver, M4 Feed ramps, 7075 T6 Aluminum, Anodized
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
Bolt Carrier: AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
Bolt Carrier Material: 9310 Alloy Steel
Bolt Carrier Finish: Nitride
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
Pistol Brace: Gauntlet Arms Polymer Stabilizing Brace - Black
Buffer Tube Kit: Heavy Duty Pistol Buffer Tube for AR-15 and AR Style Pistols
To view the most up-to-date shipping times Click HERE. To view Warranty, Returns, Terms & Restrictions Click HERE. To view State Restrictions Click HERE.