OPF-G, RMR is designed for Trijicon RMR and SRO. If you use a Holosun and the long set of screws with OPF-G, RMR, you will risk damaging the plate. Forward Controls Design does not support any Holosun sights for use with OPF-G, RMR,
Trijicon’s tolerance between the recoil lugs to the front radiused edge of the RMR is +/- 0.005. While every OPF-G, RMR has been tested on a RMR and SRO, there is always a chance it might not fit your RMR/SRO without fitting. OPF-G, RMR’s design cradles the sight tightly on the plate between the plate’s front and rear fences, some fitting may be required. A competent gunsmith can do it easily if you’re uncomfortable with fitting the plate to your sight.
OPF-G, RMR (Optics Platform, Glock, for RMR) is a Glock MOS Adapter Set 01 and Set 02 compatible plate for mounting Trijicon RMR or SRO on Glock Gen 4 and Gen 5 slides, G17, G19, G34, G35, G41, G45 (width 25mm/1 inch.) and G40 that uses Set 02. Glock’s OEM MOS plate’s width matches that of the slide, but OPF-G, RMR is already wider to fully support the RMR, thus it is compatible with all MOS equipped Glock slides.
OPF-G, RMR is a collaboration with a USMC combat veteran and former USMC Shooting Team head coach, Tom Shields. FCD used Glock’s MOS adapter plates as a basis, and designed their version of what they thought it should and can be.
OPF-G, RMR’s shape follows its functions, same as all of FCD’s products. FCD outlined the following objectives:
1. Sight is to be fully supported in the front and rear by recoil lugs/fences, with minimum movement.
2. Eliminate the need to use an additional sealer plate.
3. Correct length sight to plate, and plate to slide screws. Screws are to be Torx.
4. Adapter plate is to be machined in steel.
OPF-G, RMR accomplishes all of the goals outlined above. Machined in 1018 steel, and black nitrided, OPF-G, RMR’s thickness is unchanged from that of the Glock MOS plate, it doesn’t change the sight’s mounted height, nor does it require different iron sights.
OPF-RMR is shipped with plate to slide screws (M3-0.5mm x 6mm, same as what Glock MOS plates uses), and sight to plate screws (6/32 x 3/8), a T10 key and a VC3 packet.
Plate to slide torque value: 13in/lb
Sight to plate torque value: 13in/lb
Proudly designed and made in the USA.
OPF-G,RMR supports the full width of the RMR and SRO, so a sealer plate is not necessary. Trijicon’s position is that if the user is unsure, use the sealer plate, and the plate is so thin, if it is used it doesn’t make any difference to the thread engagement.
OPF-G, RMR is designed to sandwich the sight in its front and rear fence, do FCD makes the spacing as close to Trijicon’s dimensions and tolerance as they can. Though the FCD plate holds a 0.003 tolerance, Trijicon’s tolerance is 0.005. In practical terms, this means while some RMRs will move inside the fences by a very small amount, others will need to be forced into the space.
Vibra-tite VC-3 is included with OPF-G, RMR. Instructions can be found here: https://www.vibra-tite.com/wp-content/uploads/213_tds.pdf
Vibra-tite also provides a video on the application of VC-3: https://www.vibra-tite.com/portfolio-items/vc-3-threadmate-overview-video/
A T10 key is provided. A proper torque wrench in inch/lb increments is required to impart the correct torque to the plate to slide, and sight to plate screws.
Trjicon RMR and SRO share the same mounting footprint, OPF-G, RMR is also compatible with SRO. However, due to the precise fit of the front and rear recoil lugs/fences that are designed to closely sandwich the sight, OPF-G, RMR is not guaranteed to work with all Holosun sights.