100% OEM parts. It seems no matter where I orient the end of the spring in relation to the spring cups, the end of the coil tend to end up right at the split between the cups after some use.
I install them with the coil end 90 degrees to the split, but they slowly rotate in the direction of the coil end until they fall into the split.

I don't see this happen with Wolff springs since the coils are cut straight across and seem to grab onto the spring cups, preventing them from spinning.

There should be a double coiled end that is meant to be the spring cup end of the assembly. If the striker spring spins on any of mine, when properly assembled, I don't know, care, or understand how it will affect reliability. If you do not have a double coiled end on your spring, it's either broken or not factory.

I Didn't know that !

I learn something new everyday.....if I'm lucky !!