I keep on hand parts for the BCG group. In a SHTF situation, old crankcase oil could be put on parts for lube. No firearm will go on for ever without lube, not even my Glock.
I agree that a brand new firearm that won't go bang may have to go back to the LGS, but only after you have looked at and inspected the firearm which I believe should be taken apart and cleaned before a range session. If you can't tell what the problem is, then send it back.