This is something I got from an e-mail. It looks like a nice idea. The device replaces your standard mainspring housing, with a different one. This mainspring housing, has a screw at its bottom, through which, one can adjust the tension of the main spring, or actually remove it all together (for safety reasons, a hardware solution for a software problem, but anyway). The device is a drop-in part, which means that no gunsmithing is required and uses a two parts pin to retain the mainspring housing in its position. For people who need to adjust their trigger pull, on the fly, this looks like a neat idea.

TriggerJuster is available for a variety of pistols including Beretta 92,96,98,& 8000/8040 full size Cougar, Ruger P85 through P94 & P944, Taurus PT92,99,100 & 101, HK-USP and standard size Colt 1911 type pistols. Development is underway for Smith & Wesson and compact 1911 style pistols.

Jef Davis & Co have a patend pending on this device.