Sig Sauer MCX-Spear LT Barrel and Gass Black Assembly, 16", 5.56 NATO

Genuine replacement barrel for the 16" 5.56 MCX-SPEAR LT. Complete with barrel and gas block assembly.

*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.