Sig Sauer P320 Compact Custom Works 9mm Luger, 3.9 in Barrel, Striker-Fired, 15+1 Capacity
This Sig Sauer P320 Compact from the Custom Works series pairs the modular P320 design with a factory Custom Works-marked slide featuring lightening window cuts. It is a 9mm striker-fired compact with a 3.9 in steel, unthreaded barrel, a flat-faced skeletonized trigger, and iron sights with a green dot front. The serialized, removable FCU and textured polymer grip module with beavertail and undercut are built for serviceable, repeatable performance. Made in the USA, it includes one 15-round steel magazine marked Made in Italy.
Condition
Overall Condition: Good condition, showing some signs of prior use and 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 minor handling marks from previous use. The bore is bright and clean. Please refer to the photos for close-up views of the noted areas.
What’s Included
- Sig Sauer P320 Compact Custom Works 9mm pistol
- 1x 15-round steel SIG P320 magazine marked 'Made in Italy' with witness holes and a flush-fit base
The Custom Works-marked slide stands out with front and rear cocking serrations and lightening window cuts near the muzzle. These factory features reduce slide mass and provide confident purchase for manipulations.
Its striker-fired action is paired with a flat-faced, skeletonized trigger that offers a straight press and a consistent break. The 3.9 in steel barrel is unthreaded and sized for the Compact format.
The modular P320 architecture uses a removable serialized FCU, allowing the fire control unit to be taken out of the grip module for service or configuration changes. The grip module is polymer with molded texturing, an undercut trigger guard, and a beavertail, plus a molded SIG medallion.
Iron sights include a green dot front and a square-notch rear. An accessory rail with a 4-slot Picatinny pattern sits ahead of the trigger guard for mounting compatible lights or accessories.
Capacity is 15+1 with the included steel magazine marked Made in Italy. The frame is marked NEWINGTON, NH, USA, reflecting its U.S. manufacture.




