For proper timing and alignment, fit barrels with 5/8"-24 TPI (.308/7.62mm/.300 Blackout) threads.
Precision Made from 305 Stainless Steel.
Separate Packaging & Marked so you can quickly identify thicknesses and save time.
Each kit includes 32 shims in 8 thicknesses (.002", .003", .004", .008", .01", .02", .03", and .05"), allowing for precise adjustments to meet your specific alignment needs.