Hey everyone. When purchasing my fs2000 I was concerned of what ammo I should use. Reading the topics of Wolf ammo being used on this site, some say its good some say it sucks. So I gave it a shot with Wolf and I kid you not I did not have one hang up, not one miss fire or anything. The only problem I had is I used 2 cheap steel mags in the weapon and it did not like them at all. Then I used 3 good mags,FN,And colt mags. I used about 200 rds of all kinds of wolf ammo gray steel caseings, and green steel caseings and not one problem and accurate and not switching to the extreme gas setting I was hitting water juggs at 50-75 yrds right on the money. So anyone thats woundering about wolf ammo for your fs2000 its great, just use good mags.