The Sig Sauer Off Duty MPX pistol in 9mm with a 4.5-inch barrel and black finish (brand part no. WPMPX-4B-9-35) is a law-enforcement-exclusive configuration of Sig’s proven MPX platform, available only to verified LE and military professionals through Sig’s Off Duty program. Sig Sauer builds the pistol around a 35+1 magazine capacity with a single 35-round magazine included, and the compact 4.5-inch barrel keeps the platform maneuverable for off-duty and personal-defense carry. Among restricted-eligibility semi-auto handguns, this Off Duty MPX configuration is reserved for qualified professionals under Sig’s program terms rather than general retail sale.

Key Specifications

• Chambered in 9mm.
• The capacity is 35+1 rounds.
• The barrel measures 4.5 inches, keeping the platform compact.
• The finish is black, and the pistol ships without a brace.
• This configuration is exclusive to Sig Sauer’s Off Duty LE/military program.
• The sights are No Sights.
• The action is semi-automatic, cycling a fresh round into the chamber with every trigger pull.
• The action is a gas-operated short-stroke piston system with a rotating bolt, reducing felt recoil compared to blowback PCCs.
• The handguard is M-LOK compatible for mounting lights, foregrips, or other accessories.

Frequently Asked Questions

Can any customer purchase this pistol? No, this is a law-enforcement and military-exclusive configuration under Sig Sauer’s Off Duty program, restricted to verified professionals.

How do I verify eligibility to purchase? Contact our Lubbock, Texas gun shop directly, and our team will walk through the program’s eligibility requirements with you.

Buy the Sig MPX Off Duty (LE/Military Exclusive)

Sig’s Off Duty MPX is reserved for qualified law-enforcement and military professionals. Contact our Lubbock, Texas gun shop to verify eligibility and place your order.