Looking to pick-up some affordable extra 10rd mags for .308 and .223.. both guns are bolt-guns w/ Badger M5, I currently am using Accurate and AI mags, but I would like some extras that run good.. Which model of mag do I need? Also are Hexmags an option for me?? They look kinda cool.. Does anybody make a +2 or +4 extension for polymer mags? I would appreciate any pros and cons on running polymer mags too..Thanks guys