Product Description The TacFire SSPK9MMLPK4K is a comprehensive 9mm AR pistol build kit complete with a Lower Parts Kit (LPK), engineered to give builders everything they need to assemble a reliable and high-performing 9mm AR pistol. The kit centers around a USA-made 9mm 4.5" threaded barrel with a 1/2"-36 thread pitch, a dedicated 9mm bolt carrier group, and a USA-made Mil-Spec upper receiver. A 4" slim free-float KeyMod handguard keeps the build lightweight while offering versatile accessory mounting. Every hardware detail is addressed, from the Mil-Spec pistol buffer tube with foam cover to the complete lower parts kit, all finished in durable black steel. Product Highlights All-In-One 9mm AR Pistol Build Kit: Includes barrel, bolt carrier group, upper receiver, handguard, lower parts kit, buffer tube, and more for a complete build-ready package USA-Made Core Components: The 9mm 4.5" barrel, Mil-Spec upper receiver, and complete lower parts kit are all manufactured in the USA for consistent quality 4" Slim Free-Float KeyMod Handguard: Lightweight design with KeyMod slots for flexible accessory attachment without adding unnecessary bulk Full Mil-Spec Hardware: Mil-Spec charging handle, pistol buffer tube with foam cover, Mil-Spec/Commercial castle nut, heavy buffer, and buffer tube spring ensure reliable performance 1/2"-36 Threaded Barrel with Forwarder Brake: The included 9mm sound and flash forwarder brake threads directly onto the 1/2"-36 barrel for immediate use Specs Brand: TacFire Model: AR Build Kit MPN: SSPK9MMLPK4K UPC: 745559515949 Caliber: 9mm Luger Barrel Length: 4.5" Thread Pattern: 1/2"-36 Handguard: 4" Slim Free-Float KeyMod Material: Steel Finish: Black Weight: 4.455 lbs Dimensions: 16 x 5 x 4 in Series: KeyMod Country of Manufacture: USA (select components) 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. ]]>