PF Nickel Boron Super Match BCG worn out at 700 rounds.

[Sticks]

I would presume the finish inside the carrier is good since two other bolts went in snug, and passed my test of extending the assembled BCG, and placing it bolt down and the weight of the carrier does not force the bolt back.

I did not pull the old rings off (never heard of a once piece gas ring instead of 3). Going to wait until I have replacements.