I just bought my first AR last week. It is a brand new ANderson kinda the low buck model. I took it out yesterday and first mag went like it should. About halfway through the second mag it stopped firing. It wasnt a ftf of the ammo and it cycled a fresh round it is more like the trigger didnt reset. It would fire if I pulled the charging handle back and chambered a new round. So just wondering if there is something I should look at first or if anyone knows what needs to be fixed etc. Thanks