Looks like flash can.Supposedly a pre-ban HBAR. Looks like a flash hider cover on a flash hider (?) No bayonet lug? [EDIT] I should say muzzle device.
what does the front (muzzle end) of it look like?
Post ban, no flash suppressor (but a look alike) and no bayonet lug.
At first it looked like a plastic cover that I had on an m16a2...it kept the bore from getting sand/dirt in it and was supposed to come clean off with the first shot fired. It didn't-just melted onto the birdcage flash hider during a firefight and I wound up cutting it off with a swiss army knife.
Does it look like this? Not common, but that is a flash can.what does the front (muzzle end) of it look like?
What happened to using a condom? That was the way in my days..