- Messages
- 117
- Reactions
- 83
I bought a PSA (I know. You get what you pay for) pistol upper in 5.56. Has a very tight chamber and causing reliability issues. I can send it back to PSA, buy a chamber hone, or use a bore brush and rubbing compound. Anyone have experience with the hone or rubbing compound? Any reason I shouldn't Bubba fix this myself?