Hey everybody,
I picked up an xm177 GBBR for cheap, and it’s externally rusty and rough so no doubt left untouched for a while
When I was buying it, I stupidly only put gas in the mag and dry fired a few shots which went swimmingly
Unfortunately however, when I went to chrono it to see if an Npas was needed:
The bolt carrier group didn’t fully entry battery, all of the gas vented out of the magazine, and the BB in the magazine was left shattered.
I’m not really sure where to begin with looking for faults, however the gun is currently fully stripped down to de-rust it so can’t record a video of the issue.