SIG Sauer P320 Custom Works AXG 9mm – Killer Innovations Velocity Slide, Threaded Fluted Barrel, Harrington Arms Compensator, AXG PRO Grip, 17+1
This custom-configured SIG Sauer P320 is built around a SIG Custom Works FCU installed in the full AXG PRO aluminum grip module with a flared magwell. It features a Killer Innovations Velocity slide (referenced as VSLP320OC1 and marked VSLP320C1), an extended threaded fluted barrel, and a Harrington Arms two-port compensator. Tall iron sights with an AmeriGlo green-dot front, an optic cut with a removable cover plate, and a flat-faced skeletonized gold-colored trigger complete a well-sorted 9mm setup that retains the P320’s striker-fired simplicity.
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: Light handling marks are present from prior use.
What’s Included
- SIG Sauer P320 X-Series operator's manual
- SIG Sauer Custom Works hard case
- Two 17-round steel P320-pattern magazines (Made in USA)
Centered on a SIG Custom Works FCU and the full AXG PRO alloy grip module, this build delivers a solid metal frame feel with an integral beavertail, replaceable grip panels, and a flared magwell for fast magazine changes. A 3-slot Picatinny accessory rail on the dust cover provides standard mounting points for lights or other rail-mounted accessories.
The slide is a Killer Innovations Velocity unit with lightening windows/ports and an optic cut under a removable cover plate. It carries a matte black/gray finish and tall iron sights, with an AmeriGlo green-dot front for clear sight acquisition. The build specifically includes the Killer Innovations VSLP320OC1/VSLP320C1 slide callout as provided.
Up front, an extended threaded fluted barrel is paired with a Harrington Arms two-port compensator. This setup is designed to work with the tall sights and provides a refined, purpose-driven configuration that complements the custom slide.
The fire control is anchored by a flat-faced, skeletonized, gold-colored trigger installed in the striker-fired, semi-automatic P320 system. Chambered in 9mm Luger with a reported 4.7-inch barrel length, the pistol offers a 17+1 capacity and ships with two 17-round magazines. An external manual safety is not present.