Drum is an antique,not being made at this point,but it may come back now.there is a 50 round teardrop shaped drum available now that was old but re-introduced,very reliable,more so than the double stack 50's.,about $80 now,but may go down.
I have my own rig, a thick wooden stock made by me. I'll have to drop a bull barrel into it some time, and get another one for assault type plinking with a folding stock and some hi-cap mags.
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Trust is earned, not... GIVEN away. - Worf