It works excellent - KynSHOT PB6003 Hydrualic Guide Rod

Installed it into my G19 in conjunction with the Radiant Afterburner using factory Winchester 115 fmj ammo. The dot barely moved and I can fire double taps and 15 rounds strings just like an IPSC Pro. I have a dozen or more of guide rod type recoil reducers for various guns but this is the only one that actually worked. Looking forward to purchase one for my G29 10mm and my 1911s but unfortunately, they have not developed one yet. But if they do, I would be the first to get in line. Highly recommended.