Sig Sauer 8901315 MCX SPEAR-LT .300 BLK 9" Replacement Barrel & Gas Block AssemblyElevate your Sig Sauer MCX Rifle experience with the Sig Sauer MCX SPEAR-LT .300 BLK 9" Replacement Barrel & Gas Block Assembly. Crafted with precision and innovation, this assembly brings enhanced performance to your firearm. Designed to exceed expectations, the replacement barrel boasts a compact 9" length, optimized for maneuverability without compromising on power. Engineered for excellence, the gas block assembly ensures seamless operation, providing consistent cycling and reliability. Whether for tactical applications or sporting endeavors, the MCX SPEAR-LT .300 BLK 9" Replacement Barrel & Gas Block Assembly redefines your shooting experience with its superior design and exceptional quality.*Please Note: All NFA rules apply to the installation of these upper assemblies to lower receivers and caliber exchange kits to upper receivers. Upper assemblies and caliber exchange kits with barrel lengths less than 16" may only be affixed to lower receivers that (1) are not recorded as a rifle lower by the manufacturer and do not have a stock attached to the lower receiver or (2) registered with the BATFE as a short-barreled rifle (SBR). Please check with your local and state municipalities for any further regulatory requirements. It is your responsibility as the buyer of these components to make sure you comply with all NFA rules and applicable laws. Sig Sauer MCX SPEAR-LT .300 BLK 9" Replacement Barrel & Gas Block Assembly 8901315