Moving the SIG Sauer ROMEO2 between pistols
Page last updated . Data compiled September 2026 by the site administrator.
You already own it. Here is what changes from one slide to the next: the plate, the screw thread at each joint, the torque, the tools and any thread trap. 2 kinds of slide, covering 19 pistols, grouped by how the optic mounts and then alphabetically. Nothing is ranked. The SIG Sauer ROMEO2 page has its specs and the per-pair answers.
1 of the 2 blocks have a figure marked not on file: no maker publishes it where this site could find it, so the plate maker or a gunsmith is the source. How the data is checked.
Mounts straight to the slide
SIG P320 optic cut (Romeo1Pro pattern)
Direct (cross-fit) Direct mount — cross-compatible
7 slides: SIG Sauer P320 X-Carry, SIG Sauer P320 XCompact, SIG Sauer P320 XFive Legion, SIG Sauer P320 XTen, SIG Sauer P320 AXG Legion / AXG Pro, SIG Sauer P320 Spectre Comp, SIG Sauer P320-M17 / M18
- Optic → slide
- M4 × 0.7Supplied with the optic.
- Optic torque
- 24 in-lb (SIG manual)
- Tools
- Torque wrench, Driver bits, Calipers, Degreaser, Witness-mark paint or lacquer
- To mount
- $450–650approximate street prices, September 2026
Mounts on a plate
GLOCK MOS — standard & full size
Plate Adapter plate required
12 slides: GLOCK 19 Gen5 MOS, GLOCK 17 Gen5 MOS, GLOCK 45 Gen5 MOS, GLOCK 47 Gen5 MOS, GLOCK 49 Gen5 MOS, GLOCK 19X MOS, GLOCK 34 Gen5 MOS, GLOCK 26 Gen5 MOS, GLOCK 17 / 19 / 34 Gen4 MOS, GLOCK 22 / 23 Gen5 MOS (.40), GLOCK 35 Gen5 MOS (.40), GLOCK 44 MOS (.22 LR)
- Plate
- ROMEO2 GLOCK MOS adapter plate (SOR2M102)SIG Sauer
- Plate → slide
- per plate maker, not on file hereSupplied with the plate.
- Optic → plate
- per plate maker, not on file hereSupplied with the plate, not the optic.
- Plate torque
- per plate maker, not on file here (13.1 in-lb (1.5 Nm) is the slide maker's figure for its own plates, not this one)
- Optic torque
- per plate maker, not on file here (24 in-lb (SIG manual) is the optic maker's figure for mounting it straight on a slide)
- Tools
- Torque wrench, Driver bits, Calipers, Degreaser, A parts tray, Witness-mark paint or lacquer
- To mount
- $475–710approximate street prices, September 2026
Steps and safety: installing a red dot, from the makers' manuals. Mounting an optic is gunsmithing; confirm the pistol is unloaded first. Screw length is never listed here because it depends on the whole stack: each pair's build sheet has a calculator that works from your own caliper readings.