Sig Sauer P211 GTO 9mm Luger, 4.4 in Bull Barrel with MACH3D Compensator, ROMEO-X Red Dot, 21+1, Nitron Black
This U.S.-made Sig Sauer P211 GTO pairs a 4.4 in bull barrel and MACH3D 3D-printed compensator with a factory-mounted ROMEO-X red dot on the SIG-LOC PRO interface. It features a co-witness sighting system, a Nitron black stainless-steel frame, and a 21+1 double-stack layout. A factory test target documents a 0.53 in 3-shot group at 10 m dated 03/30/2026.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
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.
What’s Included
- SIG SAUER factory hard case with matching serialized label
- Three 21-round magazines
- SIG SAUER manuals
- Factory test target
- Spare recoil spring (factory bag)
- Factory small parts bag with CR2032 battery
- Lock
- SIG SAUER ROMEO-X SIG-LOC PRO red dot sight (installed)
The GTO variant centers on a 4.4 in bull barrel capped by a MACH3D 3D-printed compensator with a distinctive triangular profile and side/top ports. The XRAY3 front sight is pinned directly to the compensator for a stable sight picture.
The slide is finished in Nitron black and includes front and rear cocking serrations plus a lightening window over the chamber. It uses the SIG-LOC PRO bottom-mount optic interface and comes with a ROMEO-X red dot installed, with co-witness-capable backup sights.
The stainless-steel frame wears a Nitron black finish and a textured alloy grip module. A flared, removable, unmarked magwell streamlines reloads. GTO branding appears on the lower grip panels. The pistol includes ambidextrous thumb safeties, an extended beavertail, and a skeletonized trigger. A full-length dustcover integrates a 3-slot accessory rail.
Built on a 2011-style, single-action-only platform, the P211 GTO offers 21+1 capacity and accepts 2011-pattern double-stack magazines. U.S. markings read "SIG SAUER INC., NEWINGTON-NH-USA." This recent release is cataloged under MPN 211F-9-GTO-B-RXSL, with an MSRP of $2,799.