100% MADE IN USA - JUST LIKE ALL BISON ARMORY PRODUCTS!

Bulk pack includes 20 shims: 10 thin and 10 thick shims, equivalent to 5 individual sets.

Bison Armory AR-10 Barrel Nut Shim Set

20 Pack  consisting of 10x 0.001" thick shims and 10x 0.002" thick shims. That's enough to complete at least 10 upper assemblies with standard barrel nuts (Aero take more). These are for use in the installation of ALL AR-10 / LR-308 / BR-X / MA-10 / etc. rifle barrels chambered in .308 WIN / 7.62x51mm NATO or 308 Win based cartridges (e.g. .243 Win, 260 Rem, 7mm-08, etc)

Achieve perfect barrel nut / gas tube allignment within the correct barrel nut torque specifications every time, guaranteed!

NOTE: Use of these shims will NOT affect bolt / barrel headspace.

Instructions are included with your order, and please watch our instructional video on You Tube below: