I haven't yet found an adapter plate for the M17 to use an RMR which allows a rear sight and some form of backup irons. From what I’ve heard, Sig Sauer Romeo 1 Pro should have the same footprint as Leupold DPP (the standard DPP has a unique footprint). The Romeo1 Pro (MSRP: $519.99) is dimensionally identical to the Romeo1, with the exception of a slight (maybe 1/64-inch) extension on the lower front end. Bimmerland. We hands-on review four of the most popular and rugged red dots available. High-End Optic At this point I think I have tried all the available options (obviously not the pro but have used the normal R1 on a 320 slide) and the best is really to have a slide milled for an RMR. Its aircraft grade aluminum housing ensures corrosion resistance under the harshest environments, and a new upgraded point-source emitter provides increased brightness in day or night conditions with 12 brightness settings. The ROMEO1PRO is also IPX-7 rated for complete water immersion up to 1 meter. With our initial groups established, we moved on to test number two – a quick succession of rapid heating and cooling. I know at least 1 guy personally, and have heard from others on line that have P320RX with the Romeo 1 RMR. ... Sig Romeo 1 needs to be added to the list. Trijicon on Romeo. Assuming the new lower prices of the RMR, the impossibility of finding a Romeo1 and the high RX price, I would suggest going the milled P320 route and add the RMR. The mounting footprint is the same and SIG notes it will fit the optics-ready P320 X-Five Legion. Tested Pistol Red Dots (L to R): Trijicon RMR Type 2, Leupold Deltapoint Pro, Burris Fastfire 3, Vortex Venom. It’s available with either a 3 MOA or 6 MOA dot. SIG Sauer Romeo Series. X-Series (X-Compact, X-Carry, X-Full, M17, M18) X-Series w/ Romeo1Pro Cut to RMR / SRO / Holosun Adapter Plate With Rear Dovetail; X-FIVE / M17 / M18) w/ R1P/DPP Cut to RMR / SRO / Holosun Adapter Plate W/ 10-8 Rear Sight The ROMEO1PRO brings a new level of durability and performance to the miniature open-reflex red dot sight. The only negative to the RMR is price but its currently $350 at Cabelas shipped ($303 if you buy GCs from raise.com and even less if you use cashback sites.) I'm taking a look at three of the micro red dot offerings available to fit small pistols. As 407K/507K feature a modification of the Shield RMS/SMS footprint, it would be best to contact Sig Sauer directly and inquire whether any modifications to the handgun are necessary. The new cover is a huge improvement over the cheap, floppy lens cover that came with the original ROMEO1. Deltapoint Pro 25.7mm x 17.5mm; 1.01” x 0.68” Vortex razor 27.8x17.4 Vortex venom 26.3x16.3 vortex viper 17.5x24 fastfire3 is 21mm x 15mm rmr is 22mm w x 16mm h rts2 25mm w x 22mm h c-more slideride 29mm romeo3 25 wide x 21 h romeo1 30 wide x 16 h J point 21.5mm w x 15mm h Cmore > rts2/romeo3 > deltapoint SIG also includes a nice thick, well-fitting slip-on rubber lens cover. The Romeo 1 has a feature SIG refers to as MOTAC™ (Motion Activated Illumination). The three I'm looking at are the Swampfox Optics Sentinel, the Sig Sauer RomeoZero and the Shield Sights SMS2. Sig Sauer Romeo 8 Initial Group. V4 MIL/LEO MOS Sig Sauer Romeo1 Pro; Aimpoint ACRO GLOCK MOS Adapter; SIG SAUER. 2 years ago Reply. This is a discussion on Trijicon on Romeo within the Sig Sauer Optics & Electronics forums, part of the SIG Sauer Forum category; I picked up a Trijicon RMR though Cabela's sale and want to play around with it on a pistol. 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