Hi! I want to upgrade my umarex gauntlet to 22 cal. Mine shoots great in the basement at 10 meters but I want to be able to keep up with the 22 cals at the club that are shooting 100 yards. Been retired cant afford a new one. Does anyone know of anyone that makes barrels that would work on the gauntlet. I emailed Umarex and they said they were out of stock, I wated a month and emailed again and am not getting a response from them. The barrel is straight the whole length with 2 groves for the orings on the breech end. I am thinking I would need a new pellet probe but have an idea on using the 177 probe. Has anyone done this? My budget would be half the price of a new gauntlet. JCS