A&K bird cage Flash Hider - M249 MK2 / AR15 - black

M249 machine gun MK2 flame arrester, which strongly resembles the traditional birdcage design of "old school" AR/M16/M4 weapons. 14mm negative threads.

Protipsu: If you're not sure when making a "set" which "flash hider" your gun should have, put this one in. You can't really go wrong, because these are all over the world and can be found in reference photos from the 60s to the present day.