I havent jumped in on any of the polymer mags yet, i prefer metal. The C Products are suposed to be good but i havent tried them. Available in SS or aluminum, same price. The D&H aluminum mags are only $1 cheaper and i use a few of them with no problems. But i mostly use the SS HK clones that centerfire systems carry. Theyre $20 now, used to be half that. I have several of those, a few D&H, Bushmaster, and surplus. Id go with the SS, but im not concerned with the extra weight.