The Sig Sauer MCX SPEAR-LT 5.56 NATO 11.5" Replacement Barrel & Gas Block Assembly 8901313 is a high-quality replacement component designed to enhance the performance of your MCX SPEAR-LT rifle. This assembly includes an 11.5-inch barrel and a gas block, providing improved accuracy and reliability. Constructed from durable materials, it ensures long-lasting performance and easy installation. Ideal for tactical and competitive shooting, this replacement barrel and gas block assembly is a valuable upgrade for your MCX SPEAR-LT rifle.