Product Description The TacFire SS-RK300LPK rifle build kit is a Sports South Exclusive package designed for AR-platform builds in .300 AAC Blackout. This kit includes a .300 Blackout barrel, an ultra-slim free-float M-LOK handguard, and an AR-15 stripped billet upper receiver with M4 feed ramps, along with key upper and lower components to support a complete build. Outfitted with a low-profile gas block and pistol-length gas system parts, it also includes a lower parts kit, buffer system components, and an A2-style pistol grip for a streamlined, black-finished setup. Product Highlights .300 AAC Blackout AR-platform build kit with a 16" barrel for versatile rifle configurations Ultra-slim clamp-on free-float handguard with M-LOK slots for accessory mounting Stripped billet upper receiver with M4 feed ramps, plus dust cover and forward assist Low-profile (.750) gas block and pistol-length gas tube components included Includes buffer system parts, USA-made lower parts kit, and A2-style black pistol grip Specs Brand: TacFire Manufacturer Part Number: SSRK300LPK UPC: 745559515215 Platform/Fit: AR-15 / AR Platform Caliber: .300 AAC Blackout Barrel Length: 16" (per source data) Gas System: Pistol-length gas tube with pin; low-profile micro gas block (.750) Handguard: Ultra slim clamp-on free-float M-LOK handguard Upper Components Included: Stripped billet upper receiver w/ M4 feed ramps; charging handle; dust cover; forward assist Lower/Buffer Components Included: Standard receiver end plate; castle nut (steel); pistol buffer tube w/ foam; 3 oz buffer; buffer spring; lower parts kit; A2-style black pistol grip Muzzle Device Included: Spiral fluted flash can with crush washer (thread specification varies by source) Exclusive: Sports South Exclusive 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.