who makes the mag conversion for usc carbines, it enables it to be used with grease gun mags.  any help appreciated.  John

Cavalry arms is working on the conversion, it uses the same polymers as the factory so it maintains the 'factory gun' feal instead of metal mag wells that someone else (not sure who) is offering. It should be avalible in few months, if I were you I would start stocking up on grease gun mags while they are still $7 each.

Oh, the only bad thing about the conversions is that they don't have a last round bolt hold.

Are grease gun mags reliable?