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just installed a new charging handle/safety on this AB-10
the old one was slightly bend and took vise grips to disengage the safety - not an uncommon issue with stock part, I read
I purchased the aftermarket one by USMACHINEGUN, much better design
my research also found that the Tech 9 was sensitive to ammo, in that it was a simple blowback design and thin wall cases and high power 9mm ammo could experience case blow out
Winchester 115 gn 9mm FMJ is thick walled and low pressure and works just fine
the old one was slightly bend and took vise grips to disengage the safety - not an uncommon issue with stock part, I read
I purchased the aftermarket one by USMACHINEGUN, much better design
my research also found that the Tech 9 was sensitive to ammo, in that it was a simple blowback design and thin wall cases and high power 9mm ammo could experience case blow out
Winchester 115 gn 9mm FMJ is thick walled and low pressure and works just fine