bolt sticking

[FARMER00]

hi, my bolt will not slide back and forth smoothly not even when the gun is disasembled and there is no air. i dont know what to do i have another bolt (different kind) that works just fine in it but i like the other better. they are both smooth and appear as if they should both work flawlessly but the one doesnt

[Chronobreak]

might be minor differences is tolerances btwn the aftermarket bolts

i would stick with the AGD stuff

or you may need to change your powertube o-rings and reoil them