I have a Century/Cugir AES-10B RPK that took two mags to break in (still shot just fine, just cycled a little slow) and hasn't missed a beat since.
I also went out and bought a brand-new FN SLP Mark I 22" semi-auto 12ga that was NOT cheap, that i want to use for 3-gun at my gun club. It jammed so severely on every shot, i put four rounds through it, and it is currently back at FN.
ALL gun companies are not exempt from bad workmanship!!