Rust

[u/Diligent_Studio6763]

Hey all!

I recently purchased a Benelli M4. I’ve had it out twice now and put maybe 250 rounds of buckshot and slugs through it as well as some target loads. I oiled it before I put it together the first time. When taking it apart now to re apply some oil, I noticed this rust here. I was just wondering if this is a problem and something can be done about it or if this is something that just happens. I am rather new to the hobby so any and all advice would be greatly appreciated.

[u/rambo_900]

literally completely normal. my brand new m4 bolt looked the exact same. upon further inspection almost every m4 bolt has that colour there. its fine. shoot and enjoy