jamming

I've had a Hellcat RDP for just over a year and have had some persistent issues. - Occasionally the gun will not fire - the firing pin becomes sticky. To address this I strip the gun and clean it. This happens if I don't clean the gun immediately after returning from the range, and can happen...

I have a Springfield Saint AR-15 that keeps jamming. It jams so bad I have to have a gunsmith unjam it. Attached is a picture of what the bullet looks like when I get it out. The gun was professionally cleaned & it jammed after only 10 rounds. Does anyone know how to fix the gun or a good...