We do not recommend OPF-SW, RMR for use with Holosun sights due to the screw holes countersink difference. Holosun uses a metric 90 degree countersink, RMR and SRO use an 82 degree countersink.
OPF-SW, RMR will not work on either commercial or mil issued M17 and M18, and P320s where the rear sight and optics plate are integrated. It will only work on P320s with an independent rear sight as shown below:
The optics cut must have these screw holes (in red)
Machined
in 4140 steel and Melonite coated, OPF-P320, RMR, is a new
member of our OPF (Optics Platform, Forward Controls) line. We again
eschew aluminum for this application, and continue to use steel as other
OPF plates, we prefer steel plates for steel screws. 4140 steel costs
more and takes longer to machine, we use it extensively on other
products. We do not deem light weight to be of particular use in this
application, but consider reliability and durability far more useful and
important qualities.
OPF-P320, RMR is a drop
in adapter for superb Trijicon RMR sights.
OPF-P320, RMR is a Forward Controls Design and Tangodown collaboration.
Torque value for T15 6-40 x 9/16 screws: 13 to 15 in lb.
Proudly designed and made in USA.
NOTE:
OPF-P320, RMR, was designed and made for Trijicon's RMR, though Holosun 507c, 508T and 509T (with the adapter plate it comes with) also work on it, we do not guarantee fit and function for these sights.
OPF-P320, RMR will not work on either commercial or mil issued M17 and M18, and P320s whose rear sight and optics plate are integrated. It will only work on P320 with slides with separate plate and rear sight.
Incompatible: M17/M18, and SIG P320 with integrated optics plate and rear sight:
Compatible (note the rear sight has its own dovetail on the slide, the optics plate can be removed independently):
As SIG continues to make changes that make sense only to SIG, but make parts made for previous models incompatible, do note that if the cut in front of the optics pocket is straight, it will not work with our plate.
