ingram(texas version and powder springs version-both very different)you can get a magwell spacer for the 45 guns,9mm bolt and barrel.(easy as switching uppers and putting in the spacer(its held in there by epoxy)cobray has parts,nighthawk has parts,ec cetera has parts(out of copperhill)the 9mm mags for the ingrams are extremly expensive.macguns.com is a good resource,they have links there for just macs.better to get a swd "cobray" mac-the parts are widely available,the original ingrams are not.