KAK Industry Plan B Big Hole Brake – 1/2×28
The KAK Industry Plan B Big Hole Brake is a compact suppressor-ready muzzle device built for shooters who want recoil control and reliable Plan B mounting in one streamlined package. Uses 1/2×28 threads with a .375-inch bore, making it suitable for compatible .223 through 9mm setups. Machined from 17-4 stainless steel with a nitride finish, it combines durability, corrosion resistance, and repeatable taper lockup for Plan B suppressor hubs.
Features
- Compatible with Plan B suppressor hubs
- .375-inch bore for compatible .223 through 9mm applications
- Taper-and-thread interface for repeatable suppressor lockup
- 17-4 stainless steel construction
- Nitride finish for wear and corrosion resistance
- Milled 13/16-inch wrench flats for easier installation
- Fully precision machined in-house by KAK Industry
Specifications
- Thread Pitch: 1/2×28
- Bore: .375 in.
- Overall Length: 1.850 in.
- Weight: 2.5 oz
- Material: 17-4 stainless steel
- Finish: Nitride
- Protrusion: .710 in.
- Wrench Size: 13/16 in.
- Recommended Installation Torque: 20–25 ft-lbs
- Recommended Thread Locker: Rocksett
- Shim Kit: Not included
- Plan B Thread Protector: Not included



