The KAK Plan B Big Hole muzzle brake (brand part no. 410-2103-002) is rated for .223 Rem/5.56 NATO and threaded 1/2×28, finished in black, and built around KAK’s Plan B mounting system. Instead of a simple straight thread, Plan B muzzle devices use a taper followed by threads, giving a repeatable lockup and a proper seal between the brake and a compatible Plan B suppressor hub. That precision matters because some suppressor manufacturers won’t honor warranty claims if a different brand of muzzle device is used with their suppressor hub. KAK recommends Rocksett thread locker and 20 to 25 ft-lbs of torque during installation to keep the taper seated correctly.

Key Specifications

• Rated for .223 Rem/5.56 NATO.
• Threaded 1/2×28, standard for 5.56 muzzle devices.
• Uses a taper-then-thread design for repeatable lockup and a proper seal.
• Built specifically to mate with Plan B suppressor hubs.
• KAK recommends Rocksett thread locker during installation.
• Install torque spec is 20 to 25 ft-lbs.
• Using a different brand’s muzzle device may void a suppressor manufacturer’s warranty.
• Finished in black.
• Classified as a brake-style muzzle device.

Frequently Asked Questions

Does this work with any suppressor hub? It’s built specifically to mate with Plan B suppressor hubs; other brands may not seal or lock the same way.

What torque should I install this to? KAK recommends 20 to 25 ft-lbs along with Rocksett thread locker.

Why does the brand of muzzle device matter for suppressor use? Some suppressor manufacturers won’t honor warranty claims if a different brand’s muzzle device is used with their hub.

Buy the KAK Plan B Big Hole Brake

Get a repeatable, suppressor-ready lockup on your 5.56 build. Order the KAK Industry Plan B brake from our muzzle devices lineup, and our Lubbock, Texas team can help confirm hub compatibility before it ships.