Description
Salt air, humidity, and hard use are what the MAC 2 Tactical Marine was built to shrug off. Military Armament Corporation took their inertia-driven MAC 2 platform and dressed the steel in an electroless marine nickel finish, then matched it with a black synthetic stock and forend that won't swell, crack, or complain about the weather. The result is a 12 gauge semi-auto that looks sharp and holds up where blued guns start to rust.
Inertia-Driven Reliability in the MAC 2 Marine
The inertia operating system is the heart of this shotgun, and it's a smart choice for a defensive gun. There's no gas system to foul up, maintenance is about as simple as it gets, and it cycles a wide variety of 12 gauge loads without swapping parts or fiddling with adjustments. The 3 inch chamber gives you room to run everything from buckshot to magnum slugs, and the whole package stays light and quick-handling at around six and a half pounds.
Sights, Rail, and Choke Options
The 18.5 inch barrel keeps things maneuverable in tight spaces while the Benelli/Mobil pattern choke system lets you tune your pattern to the load. Three choke tubes come in the box along with a wrench, so you're covered from cylinder out to full. Up top, the ghost ring rear sight adjusts for windage and elevation, and the protected blade front post carries a white dot for fast pickup in low light. The receiver comes drilled and tapped with a Picatinny rail already installed, so mounting a red dot takes minutes, not a trip to the gunsmith.
Why the MAC 2 Tactical Marine Earns Its Keep
A big part of the appeal here is aftermarket support. The MAC 2 series accepts a wide range of parts, furniture, and accessories built for the Benelli M2, which means upgrades like extended magazine tubes and stocks are easy to find. Add the oversized charging handle, rubber recoil pad, 5+1 capacity, and a one year warranty backed by a lifetime service plan, and you've got a duty-grade scattergun that punches well above its weight.
Key Specifications
- Manufacturer: Military Armament Corporation
- Model: MAC 2 Tactical Marine
- MPN: 21000158
- UPC: 723551444382
- Gauge: 12 Gauge
- Chamber: 3 in
- Action: Semi-Auto, Inertia Operating System
- Barrel Length: 18.5 in
- Capacity: 5+1
- Finish: Electroless Marine Nickel
- Stock: Black Synthetic
- Sights: Adjustable Ghost Ring Rear, Blade Front with White Dot
- Optics Ready: Drilled & Tapped Receiver with Preinstalled Picatinny Rail
- Choke System: Benelli/Mobil Pattern, 3 Chokes Included
- Weight: 6 lb 8 oz
What’s Included
- MAC 2 Tactical Marine 12ga shotgun
- Choke tube kit (Cylinder, Modified, Full)
- Choke tube wrench
- Sight wrench
- Owner's manual
Frequently Asked Questions
Will the MAC 2 Tactical Marine accept Benelli M2 accessories?
Yes, and that's one of the best things about this platform. The MAC 2 series is built to be compatible with a wide range of aftermarket parts, furniture, and accessories made for the Benelli M2, including extended magazine tubes and replacement stocks. That gives you plenty of room to set the gun up your way.
Does the MAC 2 Marine cycle light target loads or does it need heavy ammo?
The inertia operating system is designed to run a wide variety of 12 gauge loads without any parts changes or adjustments. Like most inertia guns, it tends to be happiest with standard velocity loads and up, so give it a few boxes of your preferred ammo to confirm before relying on it. The 3 inch chamber handles everything up to magnum buckshot and slugs.
Can I mount a red dot on this shotgun?
Absolutely. The receiver comes drilled and tapped from the factory with a Picatinny rail already installed, so most red dots or other optics bolt right on. The ghost ring rear and white dot blade front make solid backup sights if you go the optic route, or a fully capable setup if you keep it irons only.
Is the nickel finish worth it over the standard black model?
If the gun will live near saltwater, in a humid climate, or on a boat, the electroless marine nickel finish is a real advantage since it resists corrosion far better than traditional bluing. It also cleans up easily after a day in rough conditions. For a defensive shotgun that may sit in storage for long stretches, that extra protection is worth having.





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