SIG Sauer P211 GTO 9mm Luger SAO 2011 Platform, 4.4 in Bull Barrel with Factory Compensator, ROMEO-X Enclosed Red Dot, 21+1, Nitron Black
The P211 GTO pairs a steel slide and frame with an alloy grip module and a factory-installed ROMEO-X enclosed-emitter red dot. It features a 4.4 in bull barrel capped by SIG's Mach3D single-port compensator, a SIG-LOC PRO direct-mount optics interface, and 21+1 capacity using 2011-pattern steel magazines. A factory test target sheet dated September 11, 2025 that matches this pistol's serial number is included.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minor scratches and blemishes are present on the exterior surfaces.
What’s Included
- SIG Sauer ROMEO-X enclosed-emitter red-dot, 6 MOA, installed (SIG-LOC PRO footprint)
- Factory SIG Sauer ROMEO-X box (model SORX1560)
- SIG Sauer factory hard case with matching 211F-9-GTO label
- Owner's manual
- Factory test target sheet
- Two color-coded recoil springs
- SIG ROMEO-X protective rubber cover
- Dawson Precision fiber-optic replacement rod(s)
- Three 21-round steel double-stack magazines
The P211 GTO is built on a 2011 platform with a full-length dustcover and accessory rail. Both slide and frame wear a Nitron black finish, and the alloy grip module carries G10 textured panels with a raised GTO logo. Dimensions are approximately 8.5 in overall length, 5.25 in height, and 45.9 oz with magazine.
The 4.4 in bull barrel is fitted with a factory Mach3D 3D-printed single-port compensator. The slide adds front and rear serrations plus a lightening cut and an optics cut to support the direct-mount interface.
Fire control is single-action only with a skeletonized trigger and a skeletonized spur-style hammer. Safety systems include a manual thumb safety, grip safety, and an internal Series-80-type firing pin block.
The installed SIG Sauer ROMEO-X uses the SIG-LOC PRO direct-mount interface and provides a red dot with a 6 MOA aiming point. The optic's model code is SORX1560, and its box label is dated June 12, 2025.