Product Description The TacFire AR Pistol Build Kit in 5.56x45mm NATO is a comprehensive, all-in-one solution for assembling a compact and powerful AR pistol from the ground up. Featuring a USA-made 7.5-inch M4-profile barrel with a pistol-length gas system, a mil-spec upper receiver, and a slim 7-inch free-float M-LOK handguard, this kit is engineered for durability, precision, and reliable performance. The kit also includes a complete lower parts kit made in the USA, a mil-spec bolt carrier group, mil-spec charging handle, pistol buffer tube assembly, and all other necessary components to complete your build. Designed specifically for the AR platform, the TacFire build kit delivers quality components that meet or exceed military specifications, making it ideal for seasoned builders and newcomers alike who want a high-performance, short-barreled AR pistol configuration. Product Highlights USA-Made Core Components: The 7.5-inch 5.56x45mm NATO barrel, mil-spec upper receiver, and complete lower parts kit are manufactured domestically for consistent quality and reliability. Mil-Spec Bolt Carrier Group and Charging Handle: Ensures dependable cycling and long-term durability through rigorous mil-spec standards. Slim Free-Float 7-Inch M-LOK Handguard: Reduces weight while providing a versatile M-LOK accessory mounting platform for lights, grips, and other attachments. Pistol-Length Gas System with Heavy Buffer Assembly: Optimized for the compact 7.5-inch barrel, delivering consistent cycling paired with a heavy buffer, buffer spring, and mil-spec aluminum pistol buffer tube with foam cover. Complete All-in-One Build Kit: Includes a dust cover, forward assist, standard receiver end plate, mil-spec/commercial castle nut, and a threaded flash forwarder so nothing is left out of your build. Specs Brand: TacFire Caliber: 5.56x45mm NATO Barrel Length: 7.5 inches Barrel Profile: M4 Barrel Twist Rate: 1:8 Gas System Length: Pistol Length Gas Block Journal Diameter: 0.750 in Thread Pitch: 1/2x28 Handguard Type: Free-Float Handguard Rail System: M-LOK Handguard Length: 7 inches Bolt Carrier Group: Mil-Spec Charging Handle: Mil-Spec Buffer Tube: Mil-Spec Pistol Buffer Tube with Foam Cover (Aluminum) Color: Black Material: Steel Weight: 6 lb Compatible Platform: AR-15 Magazine Included: No UPC: 686294505645 MPN: SSPK556LPK Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.