DPP Titanium Mounting Kit/Anti Flicker Sealing Plate Kit Compatible with Trijicon RMR * One must have this kit to mount your sight on a MOS slide - Original two long screws will NOT work You will need the custom .390 Length Mounting Screws in this kit. * When you buy an reflex sight(Compatible with RMR), it does not come with the sealing plate. With the Seal plate installed, it can be submerged up to 66ft. for at least one hour without leakage. Compatible with: All Glock MOS Models Springfield OSP Models CZ P-10 C/F/S Optics-Ready Any other firearm or mount that Compatible with Trijicon RMR/SRO * Some cut slide use #4-40 screws, the screws come with this kit will not fit.This kit is NOT FIT copycat red dots. Mounting Hardware: 1x regular sealing plate 1x anti-flicker sealing plate 6x #6-32 custom .390 Length Mounting Screws (proper screws compatible with an RMR on the Glock MOS and Springfield OSP slide) *Gen 1 Included two rubber places Made from 304 stainless steel Weight:2.8g