i like the kit, it changes how the blaster feels in that it's much heavier and feels more rigid. my only gripes are that the metal priming kit doesnt come with the rest of the pusher, so you either have to use the stock pusher or buy this kit as well. also, i noticed a couple of things that other reviews have mentioned such as the plunger being slightly too small to seal in the air chamber, though a little tape can fix that fairly quickly. also, i painted my rail and the front rail extension was a pain to install, but that was my fault, not the product's. all in all, a good product especially if you plan on doing other things to increase it's power, and the metal priming rod from the other kit is almost essential despite the installation snafu.