Earlier in the year, Sig announced the Romeo 1 Pro. This optic is similar to the Romeo 1, except the footprint is advertised as being the same as the Delta Point Pro. Also they say they improved the mechanism that holds dot zero with their “TruHold™ Lockless Zeroing System,” increased brightness of the dot, and offer 3 and 6 moa dots.
Today, my wife and I received two of them. We bolted the first one onto one of her 320 X5 Legion pistols. It went on easily, and without an adapter plate, as the Legion is direct milled from the factory for a DP Pro footprint. The Romeo has a rear sight as part of its design, and it appears to pair well with the front sight on the Legion. This is it:
Next, I tried to install the Romeo on a Gen 4 Glock 34 with a MOS plate. It wouldn’t fit, and the reason is the MOS plate has bosses that interface with the DP Pro base, and the Romeo does not have those. See picture:
Next, I tried to install the Romeo on a Glock slide that was direct milled by Primary Machine. The Primary cut does not have bosses, and so I was optimistic the Romeo would fit. Unfortunately, the Romeo was larger enough dimensionally, it would not fit on that slide.
I plan to try the Romeo on an X Compact and see how that works. My wife pointed out, by way of compatibility, the DP Pro cover fits nicely on the Romeo.