The MAC 1014 Marine is a 12 gauge semi-automatic shotgun from Military Arms with an electroless nickel finish and an 18.5-inch barrel (brand part no. 21000153). Its gas regulated piston system and corrosion-resistant nickel are aimed at maritime and tactical use. A polymer pistol grip stock with a rubber recoil pad and an integrated sling mount sets it up as a defensive or tactical platform. Adjustable ghost ring sights and an optic rail give you a choice of aiming systems. The magazine holds five rounds.

Key Specifications

• The gauge is 12 gauge with a chamber that takes 2-3/4 and 3-inch shells, so it accepts field and magnum loads.
• Barrel length is 18.5 inches, a handy length for maneuvering in tight spaces.
• Capacity is 5+1, five in the magazine plus one in the chamber.
• The action is semi-auto with a gas regulated piston system, a piston design built for hard use.
• The finish is electroless nickel, a corrosion-resistant coating that suits marine use.
• The stock is a polymer pistol grip stock with a rubber recoil pad, giving a firm grip and a softer recoil impulse.
• The stock is sling integrated, so a sling attaches without extra hardware.
• Sights are an adjustable ghost ring rear and a white blade front, a fast sight setup for close to mid range.
• A Picatinny optic rail sits on top, so a red dot or other optic can be mounted.
• Chokes use the Benelli and Mobil pattern, and the kit includes cylinder, modified and full tubes with a wrench.

Frequently Asked Questions

What makes the Marine version different? It is finished in electroless nickel, a corrosion-resistant coating, and uses a gas regulated piston system for hard-use and wet conditions.

Can I put an optic on it? Yes. The shotgun has a Picatinny optic rail, and the adjustable ghost ring sights remain in place if you choose to run iron sights.

Can I change the chokes? Yes. It uses the Benelli and Mobil pattern choke system, and the kit includes cylinder, modified and full tubes and a wrench.

Buy the MAC 1014 Marine 12 Gauge Semi-Auto Shotgun, 18.5-Inch, Nickel, Pistol Grip, 5+1

If you want a defensive 12 gauge that shrugs off moisture, the Marine pairs nickel with a piston action and a pistol grip stock. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL. Browse more from Military Arms and our other semi-auto shotguns while you are here.