The Sig Sauer P320 MOD MAX pistol in 9mm with a Nitron finish and 21+1 capacity (brand part no. 320XF-9-MAXM) delivers a striker-fired, high-capacity duty and range platform built on Sig’s modular P320 system. Sig Sauer ships the pistol with three 21-round steel magazines, and the 3.9-inch barrel pairs with an optic-cut, ported, and serrated slide for red dot compatibility and fast follow-up shots. XRay3 day/night sights support low-light target acquisition on this striker-fired design. Among high-capacity semi-auto handguns, this P320 MOD MAX configuration favors shooters who want maximum magazine capacity with optic readiness.

Key Specifications

• The chambering is 9mm.
• The capacity is 21+1 rounds.
• The barrel measures 3.9 inches.
• The slide is optic cut, ported, and serrated, supporting red dot mounting.
• The sights are XRay3 day/night sights, aiding low-light target acquisition.
• The pistol ships with three 21-round steel magazines.
• The action is striker fired, standard for the P320 platform.
• Shipping weight of approximately 4.093 pounds.
• The slide is finished in DLC (Diamond-Like Carbon), adding extra hardness and wear resistance over standard coatings.
• The grip module is the full-size X-Series module, giving a longer grip footprint for a higher hand purchase.
• Porting uses a two-port integrated expansion chamber design, venting gas to reduce muzzle rise.

Frequently Asked Questions

Is this pistol optic ready? Yes, the slide is cut for a red dot optic.

How many magazines are included? Three 21-round steel magazines ship with the pistol.

Buy the Sig Sauer P320 MOD MAX, 21+1

Maximum magazine capacity with an optic-ready slide is exactly what this P320 MOD MAX delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.