Do you have the user manual? You can also check
Kel-Tec to see if there is any info there you can use.
I don't know if you have the PF-9 or the P-11.
Kel-Tec is an American company and also offers a transferrable lifetime warranty on their firearms. If you have any question about the weapon or worries it is working improperly, call them:
Tel: 321-631-0068
Toll free 1-800-515-9983
M-F 8am-4pm EST
You can talk to a technician who will walk you through disassembly and reassembly and testing (empty of course). If they decide your weapon is not working properly, they will ask you to send it in for free repair or replacement. And, I believe they reimburse you for the shipping costs for their preferred method.
Good Luck.