[img]http://www.ar15.com/content/parts/boltCarrier.gif[/img]
Item one shown above was obviously not relaced, which caused fireing pin to not be captured.
[img]http://www.ar15.com/content/parts/lower.gif[/img]
This is not so easy, to see in pic, but the buffer retaining pin and spring set in the threaded area above between part #s 9, 10 & 23, see the threads?
The buffer retaining pin appears to have caught on a portion of your carrier, suggest ya get a thin screwdriver and working from the bottom of the carrier TRY to get the screwdriver in far enough to compress the buffer retaining pin and release the carrier for removal...
Or take the butt stock off and remove the buffer tube, but try the above first...
Mike
you asked: [b]Also would this be covered by warranty possibly?[/b]
Most companys would go outta business covering "operator error", so I doubt warranty will cover this situation as the manual that probably came w/ the rifle describes "in-detail" disassembly of your AR.