SIG SAUER P320-AXG LEGION 9mm SIG-LOC PRO 10-Round Pistol

SIG SAUER P320-AXG LEGION SIG-LOC PRO 10-Round Model

The SIG SAUER P320-AXG LEGION combines the modular P320 fire-control system with a full-size alloy AXG grip module and a compensated 3.9-inch slide assembly. This exact configuration is manufacturer part 320AXGF-9-LEGION-RXSL-10, the 9mm model supplied with three 10-round steel magazines and a SIG-LOC PRO optic-ready footprint. SIG SAUER lists no electro-optic as installed on this SKU, so an optic should not be expected in the box.

Integrated expansion chamber

The stainless-steel slide incorporates a two-port integrated expansion chamber intended to mitigate felt recoil and muzzle movement. SIG SAUER states that the slide-integrated design can provide up to a 25 percent recoil reduction. Because the expansion chamber is part of the slide system, the pistol retains a 3.9-inch carbon-steel barrel while its manufacturer-listed overall length is 8.2 inches. The barrel is non-threaded.

Front and rear slide serrations provide distinct grasping surfaces for common slide manipulations. The slide wears a Legion Gray Cerakote finish that coordinates with the alloy grip module. This is a heavier, full-size X-Series configuration: SIG SAUER lists a weight of 36.2 ounces with a magazine, an overall width of 1.6 inches and a height of 6.3 inches. Those dimensions are worth checking when selecting a case or holster.

Alloy AXG grip and LEGION controls

AXG stands for Alloy XSeries Grip, and this pistol uses the full-size aluminum-alloy grip module rather than a standard polymer frame. It is fitted with custom LEGION Hogue G10 grip panels and an installed extended magwell. The added mass and rigid grip structure complement the slide’s recoil-mitigation system, while the flared magwell supports efficient magazine insertion. An M1913 accessory rail is provided for compatible equipment.

The action is striker fired and uses an X-Series skeletonized flat trigger. This SKU does not include a manual safety. Buyers should review SIG SAUER’s P320 owner’s manual, follow established safe-handling practices and use a holster that completely protects the trigger. The installed magwell also affects magazine fit: SIG SAUER specifically notes that standard 17-round magazines are not compatible while the alloy magwell is attached, so magazine purchases should be checked against this AXG LEGION configuration.

SIG-LOC PRO optic-ready slide

The slide is optic ready with the SIG-LOC PRO footprint. SIG-LOC uses a bottom-mount arrangement designed to create five points of contact between a compatible optic and slide. This listing should not be confused with a package containing a ROMEO optic: SIG SAUER’s exact-SKU table marks the electro-optic field as “No.” A compatible optic must be purchased separately if one is desired.

Before selecting an optic, confirm that it supports the SIG-LOC PRO interface and review SIG SAUER’s current optics compatibility guidance. The factory configuration retains a 5.9-inch sight radius according to the manufacturer. Holster selection should account for the 3.9-inch barrel configuration, integrated expansion chamber, full-size AXG grip, magwell and any optic or rail accessory added later.

Key specifications

• Manufacturer part number: 320AXGF-9-LEGION-RXSL-10.
• Caliber and action: 9mm Luger, striker fired.
• Barrel: 3.9-inch carbon steel, non-threaded.
• Slide: Legion Gray Cerakote stainless steel with integrated two-port expansion chamber.
• Optic interface: SIG-LOC PRO optic ready; no electro-optic installed.
• Grip module: full-size alloy AXG with LEGION Hogue G10 grips and installed magwell.
• Trigger: skeletonized flat trigger.
• Magazines: three 10-round steel magazines.
• Rail: M1913 accessory rail.
• Manufacturer-listed size: 8.2 inches long, 1.6 inches wide and 6.3 inches high; 36.2 ounces with magazine.

Confirming the correct AXG LEGION variant

SIG SAUER offers closely related P320-AXG LEGION models with different magazine capacities and optic footprints. The -10 suffix in this part number identifies the three-magazine, 10-round package. Verify the complete part number and local transfer requirements before ordering. This product includes the pistol and listed magazines; it does not include ammunition, an electro-optic, a holster or other accessories unless separately stated.