thedr13,
I stumbled upon them one night in my search for a replacement guide rod. I searched for a couple of years, and finally, this is what I found:
Sprinco's Recoil Reducer pageMy comments (not complaint) are:
-This thing is strong as an ox
-You MAY need to keep your mag springs strong to use the system. The only reason I'm not sure is because I haven't tested my new guide rod yet. Previously, I had issues with an occasional round not chambering; [it just hung up at the barrel's opening].
As a side note, Alan Dugger is the guy I dealt with at Sprinco. He gave me a tip for ordering new mag springs. He says it's cheaper to just order an SW99 mag spring rather than a P99 mag spring. It's the same spring, but one has the Walther name attached (you know how that can be).