AR-15 Barrel Nut Shim Kit - 4 Piece
This AR-15 barrel nut shim kit allows you to index the barrel nut for perfect barrel nut / gas tube and top rail alignment while keeping the recommended barrel nut torque ranges. Shims can be used individually or combined to get the desired thickness. Kit comes with (2) .0335", (1) .0085", and (1) .0080" thick shims. The shim fits between the barrel extension and the barrel nut. The use of these shims will not affect headspace.