Shadow Systems is reintroducing replacement Gen3 slides for the G19, featuring front and rear angled serrations, our patented optic cut compatible with most robust optics on the market, front window cuts and a matte nitride finish. Please note, these slides are designed specifically for Glock Gen3 compact frames or compatible frames such as P80. They are not compatible with Shadow Systems frames like MR/DR/XR/CR920. It's important to be aware that the standard Shadow Systems recoil assembly for MR/DR/XR pistols will not work with this slide. Currently, we do not offer a Gen3 compact length recoil spring assembly. However, any Gen3 G19 barrel or Shadow Systems MR/XR920 barrel should function perfectly with this slide.