Hey guys thanks for all the help on the questions i ask, i have another one for you ar enthusiasts. i took my new ar out shooting yesterday, bushmaster lower, dti upper 30 rd polymag from promag. the first clip ran just fine, the 2nd clip gave me 4 ftf and failed to eject 9 rounds. i stopped trying, i swithed to my little brothers p mags and 20 rounds perfect, tried again and it gave me the first 3 rounds ftf and wouldnt eject the next 4 that did fire. the bcg didnt seem dirty at all, are the ars lube hogs? or where should i even start?