Upgrade and maintain your AR15 M4 or M16 with the NcStar Gen 2 Black Steel Armorers Wrench a versatile tool designed for precision and durability. This multi-functional instrument features a barrel wrench for both GI and free-float barrel nuts along with compatibility for DD and YHM barrel nuts. It includes a spanner wrench for A2 and 5/8 flash suppressors and a castle nut wrench for M4 collapsible stocks. The flat blade screwdriver accommodates A2 buttstock plates while the lower receiver push pin tool and 1/4 hex bit drive socket add to its functionality. Additionally the 1911 barrel bushing wrench and integrated tactical bottle opener make this a comprehensive tool for any firearm enthusiast. Crafted from robust steel and weighing 13 oz this 12.9-inch wrench is clearly labeled for ease of use making it an essential addition to any armorer's toolkit.