I bought a mustang mag from CTD for my 238 after seeing review that said it fit and worked in 238. The one I got does not. It fits but the front of the mag is not cut like factory and catches on the leading edge of the brass. Also the follower is much sharper corner, not sure if that is issue or not yet.
I will modify mag with die grinder and stone to look like Sig factory mag. If that doesn't fix all I may try modifying follower. If that doesn't work I will throw in trash and consider myself better educated.