The TacFire SSPK300LPK7K AR-15 Pistol Build Kit KeyMod 300 Blackout Black Steel brings together everything you need to assemble a compact .300 AAC Blackout AR pistol upper and related components. This unassembled kit centers around a 7.5" parkerized, threaded barrel marked for 300 Blackout with a 1:8 twist, paired with a 5.56/300 BO NATO bolt carrier group and an ultra slim 7" KeyMod free-float handguard for a sleek, lightweight front end.

Designed for builders who want control over every part, this kit includes the upper receiver with M4 feed ramps, pistol-length gas system with .750 gas block, bird cage A2 muzzle brake, buffer tube assembly, and a complete lower parts kit with pistol grip, trigger, and hammer. It is well suited for range use, training, or building a compact AR pistol configured to your preferences, while reflecting TacFire’s reputation for practical design and solid value in AR components.

Key Features:

• Manufacturer: TacFire
• Model: SSPK300LPK7K AR-15 Pistol Build Kit
• Caliber: .300 AAC Blackout
• Barrel Length: 7.5" threaded
• Handguard: 7" ultra slim KeyMod free-float
• Gas System: Pistol length with .750 gas block
• Bolt Carrier Group: 5.56/300 BO NATO
• Thread Pattern: 5/8"-24 tpi
• Included Components: Upper receiver, buffer tube assembly, lower parts kit with trigger, hammer, and pistol grip