flash hider

Want to sell or trade a brand new, never mounted SilencerCo ASR flash hider in .30 cal. Threads are 1/2x28 and again this has never been mounted on a firearm nor the can screwed on it! I’d be will to trade for and ASR muzzle break (AC591) in 5/8x24 thread OR would settle for a single port...

Selling off a surplus of muzzle devices I've switched suppressors around on and won't use. First is a used Silencerco 30 cal/7.62 single port muzzle brake threaded 5/8-24 used for about 25 shots of 300 blk subsonic, part number AC2627 found here...