Rough Side Charging!!

[Rockdriller]

The bolt handle is not ubbing but the carrier is rubbing in several spots as well as the gas key. This build is not complete yet so I took the charging handle from my carbine and that seemd to work noticeably better. Like you said, it took away the ability to torque in the receiver. I didn't want to lube it too much since I am going to duracoat it next week but what oil I did use made a huge difference. Its like the AA(mega) upper has a wee too much material on the bearing surfaces. Any suggestions on how to polish the inside of the upper?
Thanks for the help guys, that was bugging me all day at work today.lol