I dont know - B5 Systems Bravo Mil-Spec AR Collapsible Buttstock

it’s not the worst product for a budget build, but I was building a higher in rifle and didn’t even think that this would make as much noise as it does, but I put it on a armorspec buffer tube with silent caption, spring system, and it does great makes no noise why this butt stop rattles and clanks I wouldn’t recommend it if you’re going for something too quiet your rifle that aside it is comfortable feels good on the shoulder, but I just don’t like the play or sloppiness of it.