C&H PLT SA XDM OSP TO HOLO 407K/507K

Description

The C&H Precision Springfield XDM OSP to Holosun 407K/507K adapter plate solves a specific fitment problem: the Springfield XD(M) OSP slide uses a factory optics cut that does not directly accept the smaller RMSc footprint shared by the Holosun 407K and 507K. This plate bridges that gap, giving the slide a secure, properly aligned mounting surface for those optics without any machining to the firearm.

The plate is machined from 6061 aluminum and finished with a hard anodize in black, which matters on a component that sits between a reciprocating slide and an optic taking repeated recoil impulses. The fastener system uses patented 416 stainless steel T-nuts that thread from beneath the plate rather than directly into the aluminum body. That approach keeps the threads in steel rather than aluminum, which holds up better under the repeated torque cycles of optic removal and reinstallation. Two sets of optic mounting screws ship with the plate — shorter 4-40 x .320″ screws for the Holosun 407K and 507K, and longer 4-40 x .345″ screws for the C&H EDC and EDC Enclosed optics — so the correct engagement depth is available depending on which optic you run. Four M3 x 6mm flathead screws secure the plate itself to the slide.

Compatibility extends across the XD(M) OSP platform regardless of caliber, covering 9mm, 10mm, and .45 ACP variants. Beyond the two Holosun models, the same RMSc footprint also accepts the C&H EDC, C&H EDC Enclosed, and Vortex Defender CCW. All hardware needed for installation is included.