Its 16 inch barrel has a shroud in the end that looks like a suppressor. I can leave the FAB defense buttstock, the flat trigger I put in, the Magpull bipod, forward grip and several other goodies on there for the asking price. It also has a cross armory quick release instead of a rear pin that keep the upper and lower connected. Very convenient when taking BCG out. Love the gun, wife says I can’t keep it with the kiddo coming. Only has 250 rounds through it Thanks!