The Rearden Manufacturing FHD Flash Hider in 1/2-28 with a square shoulder and heat-treated finish (brand part no. 10021) is a flash hider made to carry Rearden’s own suppressor mounts. It is machined from 17-4 PH H900 stainless steel and is compatible with the Atlas and Atlas XL mounts as well as the Plan B system. The square shoulder seats flat against the barrel shoulder for a straight, repeatable lockup. Shims are not included, so order them separately if you want to time the device.

Key Specifications

• The thread is 1/2-28, one of the thread pitches Rearden offers on the FHD.
• The shoulder is square, which seats flat against the barrel shoulder.
• The material is 17-4 PH H900 stainless steel, known for strength and corrosion resistance.
• The finish is heat treated, as opposed to Rearden’s black nitride option.
• The device weighs 2.17 ounces in the 1/2-28 thread.
• Overall length is 1.723 inches.
• It adds 1.098 inches of length to the muzzle in 1/2-28.
• It is compatible with Atlas and Atlas XL mounts.
• It is also compatible with the Plan B mounting system.
• Shims are not included, and are needed if you want to time the device.

Frequently Asked Questions

Does it come with shims? No. Rearden says shims are not included and are required if you want to time it. Your barrel may need a shim if the manufacturer did not cut a thread relief on it.

Which suppressor mounts does it work with? Rearden lists it as compatible with Atlas and Atlas XL mounts and with the Plan B system.

What torque should I use? Rearden says to torque the muzzle device to approximately 15 to 25 foot-pounds, with the device square against the shoulder.

Buy the Rearden FHD Flash Hider, 1/2-28 Square Shoulder, Heat Treated

A good flash hider for an Atlas or Plan B setup starts with a solid foundation, and this FHD delivers it. You can find more in our rifle accessories and parts. Order it from our Lubbock, Texas gun shop for fast, insured shipping.