Sig Sauer P211 GTO 9mm SAO Double-Stack, 4.4 in Bull Barrel with Mach3D Comp, Nitron Finish, Factory ROMEO-X Pro, 21+1
The P211 GTO is Sig Sauer's double-stack, single-action-only 9mm built on a 1911-style platform and announced as new for 2025. This example pairs a 4.4 inch bull barrel with a factory Mach3D compensator, a stainless-steel slide and frame in black Nitron, and an alloy grip module. It accepts P320-pattern magazines, includes a factory-installed SIG Sauer ROMEO-X Pro red-dot, and offers a 21+1 capacity with a flared magwell and aggressive GTO grip texture.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Specific Condition Notes: Light signs of wear and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
What's Included
- SIG Sauer ROMEO-X Pro red-dot sight (installed)
- SIG Sauer operator's manual
- SIG Sauer factory hard case
- Three 21-round double-stack steel magazines
The P211 GTO combines a stainless-steel slide and frame finished in black Nitron with an alloy grip module for a robust, service-focused build. The GTO grip features aggressive texturing with G10 panels and a flared magwell to support fast, consistent reloads. Capacity is approximately 21+1, and the pistol accepts P320-pattern magazines; three 21-round magazines are included.
Its 4.4 inch bull barrel is paired with Sig's factory Mach3D compensator and an integrated compensator system on the slide. The slide adds front and rear serrations, top lightening/milling cuts, and an optic cut that uses the SIG-LOC PRO footprint. A skeletonized rounded spur hammer and a flat, skeletonized straight-pull trigger round out the controls package.
Factory iron sights are retained, with a front blade featuring a luminous green dot. This pistol comes with a SIG Sauer ROMEO-X Pro red-dot pre-installed, giving a clear red reticle on day one while maintaining the iron sights for reference.
Controls include ambidextrous manual thumb safeties, a grip safety, and a firing-pin safety, all consistent with its single-action-only, 1911-style operating system. A full-length 1913 Picatinny dust-cover rail (3-slot) provides space for compatible accessories as needed.
Markings on the frame indicate SIG SAUER INC., Newington, NH, USA, and the case label notes Made in United States. The mfg part number is 211F-9-GTO-B-RXSL, aligning with the P211 GTO series release for 2025.