So i just finished my first AR-15 build and it works very well. I just put a plain jane bcg in it along with a milspec trigger, but it just feels kind of gritty when you chamber a round,(yes i did lube it). I have looked at some videos of guys polishing the internals of their ar and is it ok to do this on mine yet? I have put about 200 rounds through it and just need to know will polishing help it function better or am i wasting my time until i run more rounds through it. Thanks in advance.