Product Description The RUGGED SUPPRESSOR SA001 precision shim kit is designed for 1/2x28 barrel threads to help properly time and align a muzzle brake or flash hider. This muzzle device alignment set includes multiple shims to fine-tune index timing during installation for a secure, correctly oriented fit. Product Highlights Precision shim kit for aligning and timing muzzle brakes or flash hiders Made for 1/2x28 threaded barrels (commonly used on many .223/5.56 platforms) Includes multiple shims to help achieve proper muzzle device index timing Simple solution for muzzle device alignment during installation Genuine Rugged Suppressor accessory (SA001) Specs Brand: RUGGED SUPPRESSOR Manufacturer Part Number: SA001 UPC: 859383006426 Thread Pattern: 1/2x28 Color: Silver Kit Contents (as labeled): Shim 1 (1 ea), Shim 2 (8 ea), Shim 3 (1 ea) Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the products manufacturer.