This dual-platform armorer's wrench services both AR-15 (5.56) and AR-10/.308 rifles with one tool. It combines barrel-nut wrenching for both platforms with a castle-nut spanner, an A2 muzzle-device cutout, and a square drive for a torque wrench. If you work on both AR-15 and AR-10 builds, this covers the common assembly and disassembly tasks without two separate wrenches.

Features:

• Sized for both AR-15 (5.56) and AR-10/.308 barrel nuts
• Castle-nut spanner for the receiver extension
• Open-end cutout for A2 muzzle devices
• Square drive accepts a torque wrench for spec torque
• One tool covers both platforms

Verify the barrel-nut profile on your specific build matches the wrench before applying torque. This is a maintenance and assembly tool, not a firearm part.