All the ones I've seen are a single feed double stack if we're talking about the same thing as an M11/9 semi or SMG. I know the mags for those guns will interchange. I'm not sure I even know what a M12 is... Maybe I'm posting uselessly here.
SNUGBUS NFA DISCUSSION is maintained by Admin
Powered by Tetra-WebBBS 6.15 © 2006-2011 tetrabb.com