SIG Sauer P226 X-FIVE Custom Works 9mm SAO, 5" Bull Barrel, Matte Stainless, Adjustable Fiber-Optic Sights, Rail, 3x 20-Round Magazines
This SIG Sauer P226 X-FIVE Custom Works is a USA-made, full-size 9mm built on a stainless steel slide and frame with a 5" bull barrel. It features the AX3 3-way adjustable single-action-only trigger, ambidextrous manual safety, and a direct-mount optics interface under the rear-sight plate (ROMEO1PRO/ROMEO2 footprint). A factory test target dated 3/26/2024 shows a 0.39-inch 3-shot group at 10 meters with SIG V-CROWN. It comes with three 20-round magazines and SIG Custom Works presentation items.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore 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 and a couple of very faint spots of pitting.
What’s Included
- SIG SAUER factory hard case (labeled 226X5-9-STAS)
- Owner's manual and SIG Custom Works documentation
- SIG SAUER factory test target
- SIG SAUER Custom Works challenge coin
- Three 20-round factory SIG SAUER P226 X-FIVE steel magazines with extended alloy base pads
The stainless steel slide and frame wear a matte stainless finish and include front and rear cocking serrations. A full-length dust cover integrates a 4-slot MIL-STD-1913/Picatinny rail, and the pistol retains an extended beavertail and factory flared alloy magwell funnel. Approximate weight is 46.2 oz.
The AX3 trigger system is single-action only and flat, skeletonized, and user-adjustable for reach, pull weight, and overtravel. An ambidextrous manual safety, extended reversible magazine release, textured black grip panels, and a sport-style takedown lever with a thumb shelf round out the control set.
Sighting equipment includes a green fiber-optic front and a fully adjustable rear with two white dots. The slide is optic-ready with a removable rear-sight cover plate, revealing a direct-mount interface for optics using the ROMEO1PRO/ROMEO2 footprint.
This example is a SIG Custom Works build from Newington, NH, with variant designation confirmed by SKU 226X5-9-STAS. The included factory test target, dated 3/26/2024, documents a 0.39-inch 3-shot group at 10 meters using SIG V-CROWN ammunition. Capacity is 20+1 in 9mm Luger.

