Recieved my new n14b stripped and cleaned it. Did the tilt test for the oprod and when it slides down the oprod pops out of the channel. Should I be worried? Also rear sight is loose and handguard is crooked big gap on rear of right side and tight at front, left side is tight up front and sinks below the stock at the rear, and the oprod also rubs against the stock. I thought the vender was supposed to address the cc on theese new ones.