Sig Sauer P320 AXG Equinox Custom Works 9mm Compact, 3.9 in Barrel, 17+1, X-RAY3 Sights, Optics-Ready
This SIG Custom Works limited-run P320 AXG Equinox stands out with its aluminum AXG grip module, two-tone Equinox slide finish, and compact 3.9 inch barrel paired with 17+1 capacity. It adds practical upgrades including SIG X-RAY3 day/night sights, a flat skeletonized trigger, and an optics-ready slide with cover plate, all packaged in a SIG Custom Works case with three 17-round steel magazines and the included challenge coin.
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: There are a few light scratches on the optic cover plate.
What’s Included
- SIG Custom Works hard case
- SIG Custom Works challenge coin
- Paperwork
- Three 17-round steel SIG Sauer P320 magazines
The AXG Equinox pairs a brushed stainless and black two-tone slide with nickel/silver-colored controls and the AXG aluminum grip module. The module features an extended beavertail, frontstrap and backstrap texturing, and a lightly beveled magazine well for smooth reloads.
The compact 3.9 inch, non-threaded barrel uses a recessed crown. The slide includes forward and rear cocking serrations and the Equinox finish treatment. It is optics-ready with an R2-style cover plate that carries the rear sight from the factory.
Factory SIG X-RAY3 day/night sights are installed, with a green-dot front and a square-notch rear mounted on the optics plate. A flat, skeletonized trigger complements the striker-fired action for a consistent pull.
A 3-slot M1913/Picatinny accessory rail is machined into the AXG frame. Markings include "SIG SAUER P320" and "Equinox" on the slide, the "SIG Custom Works" emblem, and a frame rollmark of "SIG SAUER INC., NEWINGTON–NH–USA."




