Russian
пламегаситель Spanish
flashhider 
Muzzle device designed to reduce a weapon's visible signature while firing by diverting gases.
1
A SAW assault gun equipped with a flash suppressor was slung muzzle-down over his back.
2
The Dragunov's barrel had been equipped with a flash suppressor to help hide the shooter's location.
3
Unlike the others, he had dragged his rifle with him, and its flash suppressor dug a line in the mud beside him as he walked.
1
It had a long banana-style clip and an oddly shaped flash hider.