I don't know for sure, but it worked fine. I think that there are probably more out there that broken and I have not seen any reports of guns failing. When I received my CRM back from Kel-tec first time they replaced enough that they changed S/N by adding "A" to number. I didn't see any other problems during disassembly. But all I did was field strip. Think I'll try and call Kel-tec today.