Trying to decide to what use I should put an Oly lower marked multi-cal.
Oly upper in .45 with insert to use unmodified grease gun mags?
Oly upper in 9mm with insert to use unmodified Sten gun mags?
Oly upper in 10mm? I love the 10mm, but limiting myself to 10 round magazines or real expensive modified mags galls me.
Maybe I'll save the 10mm for a Mech Tech and at least have affordable 15 rounders...