M11-SPR Severe-Duty® Muzzle Brake

This brake will outperform all other manufacturers. It is truly incredible. Some info for Ruger owners (or those with alternate thread patterns). Ruger 77 FTW Hunter, African, and Guide Gun use alternate thread pattern. I found their radial brake caused gas blowback and high pitched sound. These brakes are excellent replacement, especially to tame the larger calibers. For larger than 30 cal use standard M11 (see that item review for info). For 30 cal: FTW (all 30 cal and below) and Guide Gun 300 RCM, 300 win mag, and .30-06 are threaded at 1/2"-24 use M11 SPR and recut threads on brake from 1/2”-28 to 1/2”-24 and open the bore to 0.032” over bullet diameter, for 30 cal this is 0.340”, for which the nearest bit size is 11/32” (0.34375”). Per Precision Armament’s guidance in their spec sheet, you must achieve equal clearance of 0.032” minimum over bullet diameter from center. If you cannot accurately achieve this for safe function, this process would be simple for a qualified gunsmith or machinist. The taps for these threads can be readily ordered online at a reasonable price. I used cobalt bits, but HSS could be used if you went slow and easy and stepped up in bit size so as not to cut too much at once. Even with the smaller body size of the SPR, it provides excellent recoil reduction for all 3 of the 30 cal cartridges listed.

This brake will outperform all other manufacturers. It is truly incredible. Some info for Ruger owners (or those with alternate thread patterns). Ruger 77 FTW Hunter, African, and Guide Gun use alternate thread pattern. I found their radial brake caused gas blowback and high pitched sound. These brakes are excellent replacement, especially to tame the larger calibers. For 30 cal: FTW (all 30 cal and below) and Guide Gun 300 RCM, 300 win mag, and .30-06 are threaded at 1/2"-24 use M11 SPR (see that item review for info). For 338 win mag or 338 RCM, Ruger thread is 1/2"-32 and Precision Armament offers their shoulderless thread adapter for that thread pattern. For 375 Ruger the barrel is threaded to 5/8”-18, to which adapters can be found online (if using an adapter make sure the internal diameter is larger than the caliber) or the threads on the brake can be recut from 5/8”-24 to 5/8”-18 and the bore (use 338 brake) opened to 0.407” (0.032” over 0.375”) for which the closest bit size is 13/32” (0.4062”), or could go up to 27/64" (0.4219"). For 416 Ruger the barrel is threaded 5/8”-28 so the brake threads can be recut 5/8”-24 to 5/8”-28 and the bore (use 338 brake) opened to 0.448” min (0.416” + 0.032” over) for which closest drill bit size is 29/64” (0.4531”). You could equally use the Hypertap for 450 bushmaster for either 375 Ruger or 416 Ruger and recut threads and not have to deal with opening the bore. Per Precision Armament’s guidance in their spec sheet, you must achieve equal clearance of 0.032” minimum from center. If you cannot accurately achieve this for safe function, this process would be simple for a qualified gunsmith or machinist. The taps for these threads can be readily ordered online at a reasonable price. I used cobalt bits, but HSS could be used if you went slow and easy and stepped up in size so as not to cut too much at once.