I bought a NEW Glock 22 Gen4 40S&W and have not fired it as of yet but have found some unusual chips ( defects ) on the inside of the POLYMER frame in the area of the where the spring compresses when shot or slide is pulled back to lock open. Does anyone else have these markings (defects) on their frame? Please sound off if you do. Has anyone contacted Glock about this problem ? If so what did they tell you ?