I have searched and searched with no luck. That is why I came here. Thought I might get lucky with someone who had found one that works. I have considered buying a Timber creek Enforcer and getting some over sized springs. Or maybe try doubling up on the rear pin detent spring, and see if that works. I have had the Enforcer on my M&P 10 already. But I returned it when I found it didn't allow for the rear spring to apply enough pressure on the detent to secure the pin when field stripping. It was close though! I'm thinking a longer spring would work.