My G&G Xtreme shoots hot but I play outdoors so it's all good. It is pretty inconsistent, anywhere between 350 and 440. The blowback is crisp even though it only travels 2/3 of normal due to design, not really noticeable. It does leak co2 when mag is inserted into the gun, but stops after a couple shots. Problem is now you're down a couple rounds every time you load a mag. The gun rattles a bit more than a more expensive gun but for it's price it's a good gun. Had mine for all of last season and ran 500 rounds or so through it without issues other than the intermittent leak that stops after 2 rounds when it does happen.