Some light firing pins have given ignition problems. A certain amount of momentum is needed to fire a primer and some of the light firing pins didn't have it. Some owners installed heavier mainsprings, but that increased trigger pull or even slowed the slide, etc.
I have mentioned this before but when the Poles were working on the Radom, they used a FLGR. Then they found that the gun would fire if dropped on the muzzle, so they made the guide rod two piece with a spring, eliminating the problem. So, in addition to selling us another worthless gadget, the FLGR folks brought on us all those firing pin blocks and extra parts and horrible trigger pulls.
Jim
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