The Rugged .338 Shim Kit (brand part no. SA017) is a bag of precision shims for aligning a muzzle brake or flash hider on the heavier thread sizes used by the .338 line. Rugged Suppressors designs it for 3/4×24, M18x1 and M18x1.5 barrel threads and makes it in the USA. The bag holds three sizes of shims with a .760-inch inside diameter and a .875-inch outside diameter. Rugged includes shims with its .338 3 Port Brakes, so this kit is the answer for spares or for timing another muzzle device.

Key Specifications

• The kit is designed for 3/4×24, M18x1 and M18x1.5 barrel threads, the three pitches Rugged lists.
• The shim inside diameter is .760 inch, which has to clear the thread it sits on.
• The shim outside diameter is .875 inch, sized to seat against the muzzle device.
• The bag includes three sizes of shims, so you can dial in alignment.
• The shims align a muzzle brake or flash hider so it sits straight.
• The kit is made in the USA.
• Rugged’s .338 3 Port Brakes already include shims, so this kit covers spares and other devices.

Frequently Asked Questions

Which threads is the .338 shim kit for? Rugged designs it for 3/4×24, M18x1 and M18x1.5 barrel threads.

How many shims come in the bag? The bag holds three sizes of shims, with a .760-inch inside diameter and a .875-inch outside diameter.

Do I need it with a Rugged .338 3 Port Brake? No. Rugged says its .338 3 Port Brakes include shims, so the kit is for spares or for aligning other muzzle devices.

Buy the Rugged .338 Shim Kit

Getting a brake to index correctly is mostly a matter of having the right shim in the bag. This kit gives you three sizes in the diameters Rugged specifies for its .338 threads. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more parts and accessories.