Grayguns SIG Sauer P320 AXG 9mm Luger Full-Size – Custom Slide, 4.7 in Bull Barrel, AXG Aluminum Grip, 2x 21-Rd Mags
This custom SIG Sauer P320 AXG was built with Grayguns components and fitting, featuring a Grayguns-milled slide, a Grayguns-fitted 4.7 in bull-profile barrel, and Grayguns guide rod and spring. It uses the AXG aluminum grip module with flared magazine well and includes two 21-round magazines. The slide is cut for the Romeo1Pro/DeltaPoint Pro footprint. Markings show the frame from SIG SAUER Inc., Newington NH, and the slide from GRAYGUNS INC., Reedsport OR.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: The firearm is in good shape with handling wear present. The front sight is not installed. The slide is missing the rear cover plate with iron sights.
What’s Included
- Grayguns custom P320 slide assembly with Grayguns milling and rear R1P-pattern optic cut (no cover plate installed)
- 9mm bull-profile, non-threaded 4.7 in barrel, flush with slide (installed)
- SIG P320 AXG aluminum grip module with replaceable grip panels (installed)
- AXG-style flared magazine well (installed)
- Grayguns guide rod and spring (installed)
- 2x 21-round P320 steel magazines with extended basepads (one body stamped "MADE IN ITALY")
Grayguns completed the slide installation and milling, fitted the 4.7 in bull-profile 9mm barrel, and installed the Grayguns guide rod and spring, along with the internals. The slide features distinctive Grayguns machining with traction blocks and lightening cuts.
The AXG aluminum grip module adds a solid feel and durability, with an extended beavertail and replaceable grip panels. A flared magazine well is installed for faster reloads. The frame includes a MIL-STD-1913 accessory rail on the dustcover.
Controls include ambidextrous slide catches, a reversible magazine release, and a flat-faced trigger. The striker-fired action is consistent with the P320 system.
The slide is cut for the Romeo1Pro/DeltaPoint Pro optic interface. No cover plate or related hardware is provided. No iron sights are installed.
Two high-capacity steel magazines are included. They feature extended basepads, 21-round witness marks, and one is stamped "MADE IN ITALY." The pistol is marked "SIG SAUER INC., Newington NH" on the frame and "GRAYGUNS INC., Reedsport OR" on the slide.




