Description
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Glock MOS
Gone are the days of having to send a slide off to get milled. The time it takes to send in the slides to be milled, and varying quality of the milling work and optics ready slides notwithstanding, there was a lack a standard regarding the sight height, it’d be a coincidence if two slides milled by two different shops share the same sight height. The GLOCK MOS concept has changed the industry, but have found the failure point to be the factory MOS adapter plates. GLOCK ‘s MOS may not sit as low as some, but in our opinion, what MOS offers more than makes up for it, namely a uniform sight height, ease of installation, parts commonality and availability. Standards, commonality, availability of parts are all good things.
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, G20, G21 G34, G35, G41, G45, G47 (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’s shape follows its functions, same as all of Forward Control Designs products. They outlined the following objectives:
- Sight is to be fully supported in the front and rear by recoil lugs/fences, with minimum movement.
- Eliminate the need to use an additional sealer plate.
- Correct length sight to plate, and plate to slide screws. Screws are to be Torx.
- Adapter plate is to be machined in steel.
OPF-G, RMR accomplishes all of the goals outlined above. Machined in 4140 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 VC3 packet.
OPF-G, RMR supports the full width of the RMR and SRO, 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. Trijicon’s guide line on whether a sealer plate is required: https://www.trijicon.com/frequently-asked-questions/category/rmr-faqs
OPF-G, RMR is designed to sandwich the sight in its front and rear fence, we make the spacing as close to Trijicon’s dimensions and tolerance as we can. Though we hold 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.
Trjicon RMR and SRO share the same mounting footprint, OPF-G, RMR is also compatible with SRO.
OPF-G, RMR is compatible with G17, 19, 20, 21, 22, 23, 26, 40, 45, 47, 49 and 40. Both RMR and OPF-G, RMR are wider than G17, G17, G45, G47 and G34, and have a slight overhang on both sides of the slide. On 1.08″ and 1.12″ wide slides, the overhangs are gone. The front two corners for the plate don’t match the wider slide’s contours, this is but cosmetics. For more info, please visit this page: G20, G21, G22 Compatibility
OPF-G, DPP is not compatible with SIG Romeo X Pro (lug holes are too shallow on the X Pro).
GLOCK OPF-G, DPP is compatible with GLOCKs that use GLOCK’s Set 01 plates (17, 19, 20, 21, 22, 23, 26, 34, 40, 45, 47, 49). G40 (10mm) uses Set 02 plates that are slightly wider, while OPF-G, DPP still works with it, it will not completely fill the MOS cut’s width.
OPF-G, DPP is compatible with the EOTech EFLX, but the DPP sight screws to plates are longer, if you are buying OPF-G, DPP for use with EFLX, be sure to use the screws that came with your EFLX sight. DO NOT use DPP sight to plate screws with EFLX.
OPF-G, DPP (Optics Platform, Forward Controls, Delta Point Pro) is the latest member of the OPF line. OPF-G, DPP uses the same proven design of the OPF-G, RMR to keep the Delta Point Pro immobile, the simplest and most effective way to prevent sight to plate mounting screws from loosening and shearing.
While Leupold’s Delta Point Pro uses 4 recoil lugs (twice as that of the RMR’s) and beefier mounting screws, the challenges of keeping the sight on the plate without loosening or shearing the sight to plate screws are not very different from those of the RMR. OPF-G, DPP has a front and rear fence, the tight tolerances of the plate to slide, and sight to plate insures minimum movement along the bore in recoil.
OPF-G, DPP ships with 2 plate to slide screws (M3 0.5mm x 6mm), 2 Delta Point Pro screws M4 .7×15.8mm (from September 2024, sight to plate screws will be optional as they already come with the DPP) and a packet of VC3 Vibra-tite. A torque wrench is necessary to properly install both the plate to slide, and sight to plate screws.
Forward Controls Designs solution is to maintain the optic in a static position relative to the lateral load path by adding fore and aft recoil lugs about the optic. The front lug resists the dynamic load imparted by the slide inertia during the slide’s rearward travel (ejection cycle) while the rear lug resists the dynamic load imparted by the slide inertia during the slide’s forward travel (feed cycle). Therefore, OPF-G, RMR maintains the optic in a static position relative to the fasteners and thereby effectively reduces (if not deletes) the dynamic lateral load imparted upon the fasteners at the fastener shear plane.
DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.
GLOCK, Inc. and is one of many trademarks registered by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither Forward Controls Design nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, components or accessories. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.
Sig Sauer P320/M17/M18
OPF-P320, RMR, RSD is compatible with SIG P320 X5 Legion, commercial M17/M18, slides with Romeo1 Pro/DPP cut.
Staccato
From October of 2023, FCD has begun to transition T10 sight to plate screws to T15.
WARNING: This product can expose you to chemicals including chromium and metallic nickel, which are known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.
SPECS
Manufacturer: | Forward Control Designs |
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Material: | Billet machined in 4140 |
Finish: | Melonite coated |
Weight: | 0.86oz |
Torque Specs: | ___________________________ |
Glock | MOS Series |
ACRO, DPP, EFLX, RMR | Plate to slide: 13in/lb |
__________________________ | ___________________________ |
Sig Sauer | P320/M17/M18: |
RMR: | Plate to slide: 12 in·lb |
Acro: | Plate to slide: 20 in·lb |
__________________________ | ___________________________ |
Staccato: | P, C, C2, CS |
RMR, ACRO: | Plate to slide: 20 to 25 in/lb |
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