ZERO flash. Nada. None. Designed specifically for AK’s with the 14x1L muzzle threading, the MA-6414 Eclipse Flash Hider does not just reduce flash but rather eats it up entirely leaving nothing but inky, black night when shooting. The MA-6414 will clear any projectile 0.311" in diameter or smaller (i.e. 7.62x39, 7.62x54R, .223, 5.45, etc.) Manufactured from 8620 steel, heat treated, and then coated in black oxide to create the most durable part possible, the Eclipse is the most effective flash hider currently available for the AK series of rifles. The Eclipse Flash Hider is marked "MA" and "0.30" to denote that it is made right here in the U.S.A. by Manticore Arms for .30 caliber or smaller weapons and comes with a crush washer. It is 2.25" long, weighs 3.6 ounces, and is a standard 22mm diameter allowing for the use of most standard NATO muzzle accessories.