I picked up some pmags myself in 2 round(for legal hunting), 10 round (for competition) and 20 round for everything else. The mags where about 25 dollars each (150 all together). Not bad. The Hk mags are a lot more. Sig Sauer mags are cheaper though. Plus, I started noticing the Sig Sauer are using PMags on their newer Patrol models. HK has too much pride to have third party mags and furniture on their weapons. I tried my Hera Arms Pmags on the HK model at the store and they actually fit, which shocked me. Normally you can only use HK mags on the HK MRs.