i purchased a Winchester 1400 not working to fix up. i looked online at schematics and looks like there is an oring in the gas system. mine did not have this, threw one in on top of the piston and worked 100% is this how its supposed to be? looked at a couple videos of disassembles and didnt see one so im wondering whats supposed to be there? just an oring doesn't seem like it would last.


















































