USGI 7-PIN BARREL NUT WRENCH FOR AR-15 The Spike's Tactical USGI Barrel Nut Wrench for AR-15 is a specialized tool designed for the installation and removal of standard AR-15 barrel nuts. Constructed with durability in mind, this wrench ensures secure and efficient handling of barrel nuts during firearm assembly and maintenance. Key Features: Robust Construction: Features seven tool steel pins that are TIG welded into place, providing strength and longevity for repeated use. Drive Compatibility: Accepts a A 1/2" drive, allowing for use with a variety of torque wrenches or breaker bars to achieve precise torque specifications. Standard Fit: Specifi Mfg: Spikes Tactical