The Gemtech 5.56 ETM Flash Hider in 1/2×28 (Gemtech part no. 13815) is built to hold a Gemtech ETM suppressor in precise alignment at the muzzle. It runs 2.375 inches long and comes pre-dimpled so a gunsmith can pin and weld it to a 14.5-inch barrel. Gemtech designs the ETM interface to virtually eliminate the possibility of carbon locking with a suppressor attached, which is the usual headache after a long string of fire. Off the suppressor, it works as a flash hider on a 5.56mm AR-15. It suits shooters who run an ETM suppressor on a rifle and want a mount that comes off cleanly when the session is over.

Key Specifications

• Thread size is 1/2×28, the standard muzzle thread on 5.56mm AR-15 barrels.
• The device is a flash hider, which breaks up muzzle flash when no suppressor is mounted.
• Overall length is 2.375 inches, the figure to plan around when you add it to the barrel.
• The body is pre-dimpled so a gunsmith has an exact reference point for pin-and-weld installation.
• The interface is Gemtech’s ETM design, made to hold ETM-equipped suppressors in precise alignment.
• The ETM interface is designed to virtually eliminate carbon locking between the mount and a suppressor.
• Application is 5.56mm, matching the cartridge the ETM 5.56 line is built around.
• Gemtech also makes the ETM interface as a 3-port muzzle brake in 1/2×28, so you can pick flash control or recoil control on the same mount.
• The matching 7.62 ETM flash hider is threaded 5/8×24, so this 1/2×28 part is the one for 5.56mm rifles.

Frequently Asked Questions

What thread does the Gemtech 5.56 ETM flash hider use? It is threaded 1/2×28, the standard thread on 5.56mm AR-15 barrels.

Can this flash hider be pinned and welded? Yes. It is pre-dimpled so a gunsmith can pin and weld it to a 14.5-inch barrel.

Does it work with Gemtech ETM suppressors? Yes. It carries the ETM interface, which Gemtech designed to keep ETM-equipped suppressors aligned and to virtually eliminate carbon locking.

Buy the Gemtech 5.56 ETM Flash Hider, 1/2×28 Thread

Pair it with an ETM-equipped Gemtech suppressor or run it bare as a flash hider. Order it from Gemtech‘s selection of AR muzzle devices and it ships fast from our Lubbock, Texas gun shop.