SIG Sauer P211 GTO 9mm 1911-Style, MACH3D Compensated, Optics-Cut, Nitron Black, 4.4 in Bull Barrel, 21+1
This 2025 SIG Sauer P211 GTO is a single-action 9mm built on a 1911-style platform and configured from the factory with SIG's MACH3D 3D-printed compensator. It pairs a 4.4 in bull barrel with a Nitron black finish, an optics-cut slide for the SIG-LOC PRO interface, and a large flared aluminum magwell. It ships with three 21-round P320-pattern steel magazines, and its factory test target documents a 0.49 in 3-shot group at 10 m.
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: The chamber is clean. The rifling is sharp and exhibits a bright, shiny appearance.
What's Included
- SIG Sauer factory hard case
- SIG Sauer owner's manual
- Factory test target sheet (dated Dec 2025)
- Three 21-round SIG Sauer P320-pattern steel magazines (one with an extended base pad)
The P211 GTO configuration integrates SIG's MACH3D 3D-printed compensator with a 4.4 in bull barrel to help keep the muzzle flat while maintaining 1911-style single-action fire control. The slide wears a durable Nitron black finish, with front and rear serrations for secure manipulation.
The pistol uses a stainless steel mainframe paired with an aluminum-alloy grip module finished in Nitron black. A large flared aluminum magazine well speeds reloads, and the textured grip module with a stippled/waffled pattern provides consistent purchase.
The slide is cut for the SIG-LOC PRO optics interface and ships with a green fiber-optic front sight. The optics-ready rear interface supports user-preferred configurations for a clean, fast sight picture.
Controls include a skeletonized trigger, an external skeletonized hammer, a manual thumb safety, and a grip safety. The pistol accepts SIG P320-pattern magazines and offers a 21+1 capacity. Factory markings include "SIG SAUER P211" on the slide, "9mm x 19 SIG SAUER" on the barrel hood, and "SIG SAUER INC., NEWINGTON-NH-USA" on the frame. Provenance includes a factory test target and case label dated December 2025 matching the firearm's SKU and serial references.