B5 Systems M4 Multi-Tasker Tool – AR-15 Armorer's Wrench & Field Tool

The B5 Systems M4 Multi-Tasker Tool is a compact armorer's wrench and field maintenance tool designed specifically for AR-15/M4 platform rifles. This all-in-one tool handles common disassembly and adjustment tasks without requiring a full toolkit, making it practical for range bags, deployment kits, or home maintenance. The multi-tasker combines castle nut wrench, barrel nut wrench, and front sight adjustment tool in a single durable package.

Machined from heat-treated steel with a black oxide finish, the tool resists corrosion and wear during field use. The ergonomic design provides leverage for torquing castle nuts and barrel nuts to proper spec. Compatible with mil-spec AR-15 components including standard buffer tube castle nuts, barrel nuts, and A2-style front sight posts. Compact profile fits easily in MOLLE pouches or range bags.

• Primary Function: AR-15/M4 armorer's wrench
• Material: Heat-treated steel
• Finish: Black oxide
• Compatible With: Mil-spec AR-15 castle nuts, barrel nuts, front sight posts
• Features: Castle nut wrench, barrel nut wrench, front sight tool
• Weight: Approximately 4 oz