The Five Stone Tactical dual port brake in 1/2×28 with a black nitride finish (Five Stone Tactical part no. 600110-B) is a Plan B-compatible muzzle device for 1/2-28 threaded platforms. It is machined from 17-4 PH H900 stainless steel and uses a two-port layout that is built to help manage muzzle movement. Because it follows the Plan B pattern, it works with Plan B-style mounting systems when you are ready to add a suppressor. A set of shims is included so the port can be timed on the barrel. This listing is the 1/2×28 thread in black nitride, so confirm your barrel thread before ordering.

Key Specifications

• The thread pitch is 1/2×28, which must match your barrel for the device to fit.
• The finish is black nitride, set by Five Stone Tactical for this specific variant.
• The material is 17-4 PH H900 stainless steel, a high-strength alloy for a muzzle device.
• The design is a dual-port design, a two-port layout that is built to help manage muzzle movement.
• The mount interface is Plan B-compatible, and shims are included so the port can be timed during installation.

Frequently Asked Questions

What does Plan B-compatible mean on this device? It is designed for use with Plan B-style mounting systems, so it works with Plan B-compatible mounts and HUB adapters.

Does it come with shims? Yes. Five Stone Tactical includes shims and says to use a combination of them to time the port, which takes some trial and error before the device is secured.

How should it be installed? Five Stone Tactical recommends Flexbar Rocksett high temperature adhesive on the barrel threads only, then tightening to 33 ft. lbs. (45 Nm) with a 13/16-inch wrench, with anti-seize grease at the muzzle device to HUB adapter interface. Check alignment with an alignment rod before use and do not use the setup if the rod is close to or touching the strike baffle or end cap.

Buy the Five Stone Tactical Plan B Dual Port Brake, 1/2×28 Black Nitride

Pick the thread and finish that match your build, and this dual port brake drops into a Plan B system without fuss. Browse more AR muzzle devices and order from our Lubbock, Texas gun shop for fast, insured shipping.