SIG Sauer P211 GTO 9mm Luger, 4.4 in Bull Barrel with Mach3D Compensator, SAO Steel Frame, 21+1, Optic-Cut Slide with Holosun HE507C-GR X2
The SIG Sauer P211 GTO is a full-size, single-action-only 9mm built on a steel frame with performance-focused details throughout. It features a 4.4 in bull barrel paired with SIG's Mach3D compensator, an optic-cut slide with a Holosun HE507C-GR X2 mounted, and a high-capacity 21+1 system using 2011-pattern double-stack steel magazines. This example includes a factory accuracy card documenting a 0.75 in 10 m group dated September 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: Shows little signs of prior use. The bore is clean and shiny.
What’s Included
- SIG SAUER factory hard case
- SIG SAUER P211 operator's manual
- Holosun HE507C-GR X2 reflex sight (installed)
- Spare recoil spring
- Optic cut cover plate (not installed)
- Cable lock
- SIG SAUER factory test/accuracy card
- 3x 21-round magazines
The P211 GTO combines a steel frame with an alloy grip module and an enlarged aluminum magazine well for fast, confident handling. Textured grip panels bearing the GTO logo provide secure purchase, while the flat, skeletonized, adjustable trigger supports precise single-action control. Manual safety controls complement the hammer-fired SAO system.
Its 4.4 in bull barrel is matched to the SIG Mach3D compensator with top and side ports. A green fiber-optic front sight provides a clear, uninterrupted sight picture. The slide carries forward and rear serrations and an optic cut; this pistol arrives with a Holosun HE507C-GR X2 already installed.
A full-length dustcover with a 3-slot 1913/Picatinny rail offers straightforward light or accessory mounting. The platform uses high-capacity, 2011-pattern double-stack steel magazines, delivering a 21+1 capacity; three 21-round extended steel magazines are included.
Markings include "SIG SAUER P211" on the slide, "9mm x 19 SIG SAUER" on the chamber hood, and "SIG SAUER INC., NEWINGTON-NH-USA" on the frame. The included factory accuracy card shows a 0.75 in group at 10 m on September 26, 2025 with PPU 124 gr FMJ.