PRODUCT DESCRIPTIONThe Cornerstone thread insert muzzle brake is a 17-4PH stainless steel insert for use with the Sportsman Direct Thread silencer. The 1/2×28 Insert can be used on small calibers up to 300WM. Sportsman Direct Thread Silencers come with a 5/8×24 TPI muzzle brake thread insert and installation tool. The Sportsman Taper Mount Thread Insert should not be used as a standalone brake.
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