Did not work for very long - KNS Precision PERMA Firing Pin Retaining Pin

When my original cotter pin got distorted enough to be difficult to insert, I bought this fancy version thinking it was a low cost but durable replacement. Goes in easily and seemed to fit well, but here I am about 200 rounds later and I have to replace it. For whatever reason, it will not stay in the bcg, and just falls out. Fortunately this didn’t happen during a critical period. I will avoid these in the future and will not recommend them to anyone else.