Don't waste your time with these clowns. Tried ordering a front sight post for an AK rifle for a project and was refused because "it could be used on a prohibited weapon". I didn't even try to argue with stupidity like that.
I've had a few other incidents and I even brought them to John's attention by PM and didn't even get so much as an acknowledgement. Marstar can sink and go bankrupt as far as I'm concerned. There's nothing you can get from them that you can't get from other suppliers that are actually interested in serving you.