Otter Creek Arms Llc144597129
Otter Creek Arms Ocl-803 Otb Muzzle Brake Black Nitride$183.75
Availability: In Stock
Current Stock: Out of stock
The Otter Creek Arms OCL-843 OTB Muzzle Brake is a 5/8x24 threaded adapter built for shooters running OPS 12th model suppressors—the OCM5 or AEM5—on barrels that would otherwise need custom work or proprietary collars. Machined from H900 heat-treated 17-4 stainless steel and finished in black nitride, this one-piece muzzle brake combines the function of a timing adapter with a muzzle device, letting you mount your suppressor to any 5/8x24 barrel with 0.75" or less outside diameter and a minimum of 2.05" of exposed barrel measured from the shoulder. If you've been holding off a build because your barrel didn't fit the standard OTB mount, this solves that problem without a trip to a gunsmith.
The real value here is in the included shim kit. Unlike the standard OTB flash hider, the OTB Muzzle Brake ships with a full set of shims for proper timing—and using shims is the only approved method for timing this device. That built-in hardware saves you a separate purchase and keeps everything in one box. The black nitride coating delivers durability and a clean look, though Otter Creek also offers a raw heat-treat finish if that's your preference.
Installation is straightforward on any 5/8x24 threaded barrel. One critical detail: do not use a crush washer with this muzzle device—doing so voids the warranty. Hand-time the brake with your shims until the suppressor sits perfectly, and you're ready to run. Built tough for long-range rifles, precision ARs, and any setup where suppressor alignment matters.
| Brand | Otter Creek Arms LLC |
| Model | OCL-843 OTB Muzzle Brake |
| Thread Pattern | 5/8x24 |
| Material | H900 heat-treated 17-4 stainless steel |
| Finish | Black nitride |
| Compatible Suppressors | OPS 12th model (OCM5, AEM5) |
| Maximum Barrel OD | 0.75" |
| Minimum Exposed Barrel Length | 2.05" (measured from shoulder) |
| Includes | Shim kit for timing |
The OTB Muzzle Brake is designed for OPS 12th model suppressors, specifically the OCM5 and AEM5. If you're running a different suppressor pattern, this adapter won't be compatible.
No. Do not use a crush washer with the OTB Muzzle Brake—it voids the warranty. The included shim kit is the only approved method for timing. Hand-tighten the brake and use shims to achieve perfect alignment with your suppressor.
The OCL-843 fits any barrel with 5/8x24 threads, an outside diameter of 0.75" or less, and a minimum of 2.05" of exposed barrel measured from the shoulder. No custom barrel work is needed.
The muzzle brake comes with a shim kit for timing your suppressor. Unlike some other OTB adapters, the shim set is included, so you won't need to purchase it separately.
SKU: 144599730
Availability: In Stock
Current Stock: Out of stock
The Otter Creek Arms OCL-843 OTB Muzzle Brake is a 5/8x24 threaded adapter built for shooters running OPS 12th model suppressors—the OCM5 or AEM5—on barrels that would otherwise need custom work or proprietary collars. Machined from H900 heat-treated 17-4 stainless steel and finished in black nitride, this one-piece muzzle brake combines the function of a timing adapter with a muzzle device, letting you mount your suppressor to any 5/8x24 barrel with 0.75" or less outside diameter and a minimum of 2.05" of exposed barrel measured from the shoulder. If you've been holding off a build because your barrel didn't fit the standard OTB mount, this solves that problem without a trip to a gunsmith.
The real value here is in the included shim kit. Unlike the standard OTB flash hider, the OTB Muzzle Brake ships with a full set of shims for proper timing—and using shims is the only approved method for timing this device. That built-in hardware saves you a separate purchase and keeps everything in one box. The black nitride coating delivers durability and a clean look, though Otter Creek also offers a raw heat-treat finish if that's your preference.
Installation is straightforward on any 5/8x24 threaded barrel. One critical detail: do not use a crush washer with this muzzle device—doing so voids the warranty. Hand-time the brake with your shims until the suppressor sits perfectly, and you're ready to run. Built tough for long-range rifles, precision ARs, and any setup where suppressor alignment matters.
| Brand | Otter Creek Arms LLC |
| Model | OCL-843 OTB Muzzle Brake |
| Thread Pattern | 5/8x24 |
| Material | H900 heat-treated 17-4 stainless steel |
| Finish | Black nitride |
| Compatible Suppressors | OPS 12th model (OCM5, AEM5) |
| Maximum Barrel OD | 0.75" |
| Minimum Exposed Barrel Length | 2.05" (measured from shoulder) |
| Includes | Shim kit for timing |
The OTB Muzzle Brake is designed for OPS 12th model suppressors, specifically the OCM5 and AEM5. If you're running a different suppressor pattern, this adapter won't be compatible.
No. Do not use a crush washer with the OTB Muzzle Brake—it voids the warranty. The included shim kit is the only approved method for timing. Hand-tighten the brake and use shims to achieve perfect alignment with your suppressor.
The OCL-843 fits any barrel with 5/8x24 threads, an outside diameter of 0.75" or less, and a minimum of 2.05" of exposed barrel measured from the shoulder. No custom barrel work is needed.
The muzzle brake comes with a shim kit for timing your suppressor. Unlike some other OTB adapters, the shim set is included, so you won't need to purchase it separately.
SKU: 144599730