The OTB Muzzle Brake works the same as the standard OTB mount, only with a built in muzzle device, Made from H900 heat treated 17-4 steel this one piece adapter will allow you to mount your OPS 12th model, OCM5 or AEM5 to ANY barrel with 1/228 threads that is .75 or less OD and a minimum of 2.05 of exposed barrel MEASURED FROM THE SHOULDER.
| FireArm | No |
| Material | H900 heat treated 17-4 steel |
| Thread Pattern | 1/2"x28 |
| Model | OTB |
