Otter Creek Labs OTB Muzzle Brake

The Otter Creek Labs OTB Muzzle Brake (OCL-803) is a one-piece over-the-barrel muzzle device that combines a high-performance brake with an integrated suppressor mounting interface. Machined from H900 heat-treated 17-4 stainless steel and available in a black nitride or raw finish, the OTB eliminates the need for separate collars or custom barrel work by providing a factory-style adapter and brake in a single unit.

Designed for barrels threaded 1/2-28 and with an outside diameter of 0.75″ or less, the OTB accepts popular OPS/OCM/AEM style suppressors (OPS 12th model, OCM5, AEM5 patterns). The device ships with a shim kit for timing and indexing the brake ports; the shim kit is the approved method for achieving proper alignment. For secure mounting the OTB requires a specified length of exposed barrel measured from the shoulder — verify the required minimum exposed length for your thread pitch and barrel profile prior to installation.

Functionally, the OTB reduces felt recoil and muzzle rise when fired unsuppressed while providing a repeatable, rock-solid interface for quick attach/detach of compatible suppressors. Its one-piece design simplifies installation and improves concentricity for consistent point-of-impact retention.

Key Features & Specifications

• Model: OCL-803 (OTB Muzzle Brake)

• Thread pitch: 1/2-28 (also available in 5/8×24 variants)

• Material: H900 heat-treated 17-4 stainless steel

• Finish: Black nitride or raw heat treat options

• Max barrel OD: 0.75″ (maximum)

• Required exposed barrel length: verify for your configuration (shim kit included for timing)

• Designed to accept: OPS 12th pattern / OCM5 / AEM5 style suppressors

• One-piece brake + mount eliminates separate collar requirement

• Includes shim kit for port timing and alignment

The OTB Muzzle Brake is ideal for shooters who want a durable, repeatable suppressor interface while retaining effective muzzle control unsuppressed.