I have one, very fun to shoot. I should have bought some additional mags when I had the chance.
If you're buying one new it probably has the updated bolt system. If it doesn't, a simple call to their customer service line will get one in the mail to you wothin minutes.
I have about 1500 rounds through it. I only had problems when the defective E clip failed. The spring broke and it wouldn't cycle properly. A friend was shooting it at the time and manually cycled and fired another 10 shots. Other than that, no cycle problems, even with subsonic rounds.
Very easy to disassemble and clean. I'm very happy with it.
ETA Ill buy two of your 25 round mags (and maybe a drum).
This post was edited on 2/5 at 7:40 am