youre right of course ,and when i bought my escort ,a very kind and knowledgeable staff member said to me to always keep the bloody thing cleaned -any crap etc on the mag tube -piston will bind and bend bolt carrier rods.Ive been bloody scrupulous about this and the old girl is still chugging along. what did eventually fracture was the piston where it had had a thread machined into the body to screw the spring retaining collar on.an autopsy suggested a stress fracture of the metal ,but given it was 2nd hand when i bought it and i had a spare piston in a box given me,it was a 5min fix.
sometime after that a guy contacted me with a tidy wee escort12g s/a centennial model which hed bought for his partner only for it to go doggo --One look and bingo -bent bolt carrier bars with dirt like a westcoast coal fire grate clearly visible on the mag tube.I managed to get it back to functioning altho eventually I think she switched to a 20g due to her slight build. im a simple hunter with a taste for simple guns -less parts ,less chance of a bloody expensive malfunction!
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