Look Ma No Milling JT Defense Pistol Optic Mount The 26 07 2017· The JT Defense mount seeks to correct that issue by replacing the striker plate on Glock or XD pistols and locking to the rear sight dovetail There is no need to machine the pistol the mount can be installed and of course it can be removed just as easily JT Defense no mill optic installed on a Glock 22 To be sure there are tradeoffs