The Gauntlet has some extensive aftermarket parts supply. I have shot the Hatsan Flashpup, but not the flash, I prefer the Gauntlet, I have the .22 caliber Gauntlet. You can get a 22 cubic inch tank for the Gauntlet, which could power a nights worth of shooting between fills. If you are into tinkering or not I recommend the Gauntlet, it has much more support than Hatsan rifles seem to.