his mag is great. I was having issues with my wife's gun (evike Stubby Killer) shooting 270fps when it was supposed to shoot 330. I could not figure it out until I put in this mag. Believe it or not, the fps went up to 332 just by putting in this mag. I didn't realize the seal of the magazine on the hopup would actually improve fps. I tried this on 3 guns and I saw an fps increase in all 3! Fantastic mag, in fact I think Im going to go buy 3 more after Im done with this review!
Pro:
-Looks sweet
-Tough plastic, sturdy
-GREAT seal, much better than regular mags. ZERO wobble unlike normal mags
-Actually increased fps in every gun I tried it on
Con:
-Evike doesn't sell them in other colors, only dark earth =(