DPP Titanium Optic Mount/Adapter Plate Compatible with Walther PDP 1.0 Holosun 407K/507K/EPS CarryMount plate is CNC milled from 6AL4V Titanium billet, which has vastly superior mechanical properties to 6061 T6 Aluminum. This kit includes everything you need to mount the 507K 407K EPS Carry on your PDP 1. 0 slide. Not Fit PDP 2. 0. Since PDP 1. 0 has no recoil lug, this adapter plate is designed to tight fit on the slide, sometimes needing to press it in. Adding a little oil or removing a little coating will make it easier. Compatible with Walther