M11-SPR Severe-Duty® Muzzle Brake

SKU:
A040
$104.95
(2 reviews)
- Accu-Washer™ Muzzle Alignment System recommended for installation (not included)
Current Stock:
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DESCRIPTION

The M11-SPR (Special Purpose Rifle) is a compact lightweight version of the M11 designed specifically for high precision AR-15 rifles and long range hunting rifles. A large symmetrical blast baffle along with compensated forward baffles provide unprecedented muzzle control and recoil management while minimizing induced bullet yaw for improved long range accuracy. Computer FEA optimized for maximum strength to weight ratio and precision machined from heat treated stainless steel for superior durability. Features wrench flats for easy installation and removal. Available in Ionbond® matte black, or stainless steel in-the-white (satin grey).

Fits .223/5.56mm rifles with 1/2-28 muzzle threads (Factory bored for .223 Caliber but may be enlarged up to .338 Caliber by a qualified gunsmith).

SPECS

Thread: 1/2x28
Length: 2.225"
Width: 1.125"
Dia. at Barrel: 0.750"
Weight: 3.3oz
Full Spec Sheet: View PDF
Installation Manual: View PDF

FEATURES

M11 SPR muzzle brake with Magpul bipod and Accu-Washer Shim

Top ports vent gases upward for muzzle rise mitigation

 

M11 SPR with Magpul bipod

Deep, recessed crown protects exit aperture from impact damage

 

M11 SPR with Accu-Washer Shim on FN SCAR

Digressing baffle thickness reduces baffle/projectile interaction

 

M11 SPR with Accu-Washer Shim on FN SCAR

Perfect bore alignment by machining brake threads in the same operation as bore aperture

 

 

 

RESOURCES

For thread specifications, general information, and more - visit our Technical Resources page:

 

Caliber:
5.56mm/.223
Thread:
1/2x28

Reviews

  • 5
    Superb brake!

    Posted by Michael on 29th Jan 2021

    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.

  • 5
    Amazing brake!

    Posted by Michael on 29th Jan 2021

    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.