Introduction
The Spike's Tactical Barrel Nut Shim Kit allows you to torque your barrel nut into place with perfect alignment when having to install your Spike’s Tactical BAR or SAR rail.

Features

• Align your gas port at full torque
• Works with M4 Barrel Nut & most Rail Systems

Included

• Spike’s Tactical Barrel Alignment Kit
• 3 Thin Barrel Nut Shims (.0015" Thick)
• 3 Thick Barrel Nut Shims (.003" Thick)
• Spike's Tactical Lifetime Warranty