Real Avid’s 13-piece Master-Fit AR-15 crowfoot wrench set was purpose designed for building and modifying AR-15 rifles — specialized for precise fitment and manipulation of Mil-Spec and free-float barrel nuts, muzzle devices and castle nuts. Titanium coated stainless steel construction provides tight tolerances for solid, nut-gripping strength and enhanced no-slip tool control. The 13-piece set includes 12 specialized wrenches that fit the most common AR-15 assembly nut sizes and a heavy-duty Master-Fit torque wrench. It is also available in a five-piece configuration and comes in a durable hard-side storage case. MSRP: $299.99/13-piece set; $149.99/Five-piece set. Contact: www.realavid.com