Hello I'm a new member to the forum but not new to air guns as I own many. Crosman 2300kt 22 cal, Crosman Storm xt 177 cal , Crosman viglante 177, ruger air magnum 22, Hatsan mod 25 177 just to name a few. I just purchased the mod 25 and am very pleased with it . But one thing has me baffled it...