The best ops 12/AE pattern mount ever made – you could try and debate it but you’d be wasting your time.

The OTB Muzzle Brake from Otter Creek Labs solves one common problem—too much gear—by combining suppressor mount and brake in one solid piece.
Machined from H900 heat-treated 17-4 stainless, this is a one-and-done solution for OPS Inc. 12, AEM5, or OCM5 owners who want simplicity without compromise.

The OTB Muzzle Brake works the same as our 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 1/2×28 threads that is .75 or less OD and a minimum of 2.05 of exposed barrel MEASURED FROM THE SHOULDER.

Pick your flavor of black nitride coated or raw heat treat, slap it on your rifle and go – no custom collars or custom barrel work needed.

DO NOT USE A CRUSH WASHER WITH THIS MUZZLE DEVICE OR IT VOIDS ALL WARRANTY.

It comes with a shim kit for timing in the box and this shim kit is the only approved method for timing. The reason the OTB-MB costs more than the OTB-FH is because it comes with the shim kit whereas the OTB-FH does not need timing.