Your last post explained the issue to me. You can try another hammer spring that has the legs sitting parallel to inside receiver walls, or spread the current spring.
Another thing; in one photo I see the ends of the hammer spring being pushed towards middle of lower receiver by the curves, wondering if the ends of the hammer spring are too long. If this is the case, I would trim an eighth of an inch off the ends/legs. As long as spring legs are resting on trigger pin, should be fine.
Mark
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