I found Pro mag 20 round drums for $69 but while at a local gunshop today the owner had a MD 20 rounder he got off a trade in i was going to buy it but it was sold when i told him i found Promags for 69 he told me never never buy promag because they do not work. So if you have a Promag drum should i save money and get it of just get the MD and not have any PLAY money for a little while ?