The TacFire AR Build Kit 5.56x45mm NATO 7.50" Barrel Black for AR Platform brings together a complete set of upper and lower components to assemble a compact AR-15 style pistol. Centered around a 7.5" M4-profile barrel with 1:8 twist and 1/2x28 threads, the kit includes a free-float M-LOK handguard, mil-spec upper receiver, bolt carrier group, charging handle, and essential small parts for a cohesive build.

This unassembled kit is ideal for shooters who want to customize an AR pistol for range use, training, or general recreational shooting while selecting their own lower receiver. The included pistol-length gas system, heavy buffer, and pistol buffer tube with foam cover help support reliable function and comfortable handling. TacFire’s attention to mil-spec compatibility and component quality makes this kit a practical foundation for a dependable AR platform project.

Key Features:

• Manufacturer: TacFire
• Model: AR Build Kit
• Caliber: 5.56x45mm NATO
• Action: Semi-Auto
• Barrel Length: 7.5"
• Handguard Type: Slim Free-Float M-LOK
• Gas System Length: Pistol Length
• Muzzle Device: A2 Flash Hider
• Bolt Carrier Group Included: Mil-Spec
• Charging Handle Included: Mil-Spec
• Color: Black
• Gun Model: AR-15
• Gun Make: AR Platform
• Weight: 6 lb