SIG Sauer P320 Compact Custom Build

The Modern Modular: A Tailored Striker-Fired Evolution 

This P320 Compact, built around the Fire Control Unit (FCU) serial FCU372656, is a prime example of the platform’s legendary modularity. Rather than a factory-standard configuration, this build has been curated using high-tier aftermarket components to maximize performance. By utilizing the Wilson Combat Grip Module, the shooter gains a slimmer, more ergonomic profile with aggressive "Starburst" texturing. The addition of a Steel City “P40 Warthog” Optics-Ready Slide and a True Precision Barrel paired with a Herrington Arms Compensator transforms this compact 9mm into a flat-shooting carry gun. This setup mimics the performance of a full-sized competition pistol while maintaining the footprint of a concealed carry firearm.

Condition and Action Highlights

Action: Striker-fired semi-automatic; utilizes the modular SIG FCU, known for its consistent trigger pull and ease of maintenance.

Grip: Wilson Combat Compact Grip Module; provides improved recoil management and a more natural point of aim compared to the factory SIG frame.

Slide Assembly: Steel City “P40 Warthog” Optics-Ready Slide; A unique look coupled with aggressive serrations for easy manipulation. It is topped with Trijicon Suppressor Height Night Sights, offering a 1/3 co-witness with most modern red dot optics.

Barrel & Comp: True Precision Match Grade Barrel finished with a Herrington Arms Compensator. This combination is engineered to bleed off gases upward, significantly reducing muzzle flip for faster follow-up shots.

Condition: Excellent condition with a low round count; the finish on the slide and the barrel's hood shows minimal friction wear.

Magazine: Includes one 15-round flush-fit magazine.

Technical Specifications

Manufacturer: SIG Sauer 

Model: P320C Custom

Serial Number: FCU372656

Caliber: 9mm Luger

Barrel Length: Approx. 3.9" (Standard Compact) + Compensator length