"This gun shoots fast, its super powerful, and looks sweeeet. The one thing wrong with it is that it's a co2 hog. You can shoot about 4-6 16-round mags, then the gun looses alot of power. But overall, I love it! It shoots harder than my 400 fps dboys m4 s-system no doubt about it. It shoots the best with .25 gram bb's."