SIG Sauer P211 GTO RXSL 9mm, 4.4 in Bull Barrel with Mach3D Compensator, Steel Frame, ROMEO-X PRO, 21+1 Capacity
This full-size SIG Sauer P211 GTO RXSL is a recent-release, single-action 9mm built on a 1911-style platform with a steel frame and slide mated to an alloy grip module. It features a 4.4 in bull barrel with a factory Mach3D single-baffle compensator, an integral 3-slot Picatinny rail, and a factory-installed SIG ROMEO-X PRO red dot that co-witnesses with the fiber-optic front and plain rear notch sights. It ships with two 21-round steel magazines that follow the SIG P320 pattern, and the factory case label is dated December 26, 2025.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Superficial scratches and minor blemishes are present on the exterior surfaces.
What’s Included
- SIG Sauer factory hard case with matching label (SKU 211F-9-GTO-B-RXSL)
- SIG Sauer P211 operator's manual
- SIG Sauer ROMEO-X PRO red dot sight (installed)
- SIG ROMEO-X Series accessory kit (as packaged)
- Spare recoil spring (factory)
- Two 21-round steel magazines (one body stamped 'MADE IN ITALY')
The GTO RXSL package delivers a low-mount optic system from the factory, here paired with SIG's ROMEO-X PRO 1x red dot. The optic sits low for co-witness with the green fiber-optic front and plain rear notch, and uses top-mounted controls with a top battery compartment for straightforward access.
Its 4.4 in bull barrel is paired with SIG's factory Mach3D single-baffle compensator using a non-threaded attachment. The full-length dust cover integrates a 3-slot Picatinny rail for light or accessory placement.
Controls and fire-control components reflect a modern 1911-style layout: single-action only, ambidextrous manual thumb safety, grip safety, and a Series 80-style firing-pin safety. A flat, straight-pull skeletonized trigger and a skeletonized commander-style hammer are fitted. Textured GTO-pattern grip panels and a flared magazine well support positive handling.
This model uses SIG P320-pattern high-capacity magazines and is rated at 21+1 capacity in 9mm Luger. Approximate dimensions are 8.5 in L x 5.25 in H x 1.5 in W, and weight is about 46 oz unloaded with the optic installed. The steel frame and slide are matched to an alloy grip module, and the frame serial matches the included case label dated December 26, 2025.