The Benelli M4 EXT is the combat-proven M4 platform, unleashed. Benelli didn't reinvent it — they gave it what operators have been asking for: 7+1 capacity, a 5-position telescoping stock, and an oversized bolt release built for gloved hands and high-stress reloads. This Flat Dark Earth Cerakote variant pairs that low-visibility finish with an 18.5" barrel, ghost-ring sights, and the same A.R.G.O. gas system that made the M4 the standard-issue shotgun of the U.S. Marine Corps. Benelli item number 11788, UPC 650350117882.

A.R.G.O. — Unfailing By Design

At the heart of the M4 EXT is Benelli's Auto-Regulating Gas-Operated (A.R.G.O.) system: dual short-stroke gas pistons positioned close to the chamber, engineered to run clean, cycle anything, and keep firing through dirt, heat, and punishing round counts. The system is self-cleaning and low-maintenance with no tuning required — it self-regulates across 2¾" and 3" loads, from reduced-recoil buckshot to full-power slugs. A.R.G.O. is the reason the M4 has held its reputation for decades under military, law enforcement, and hard civilian use.

More Capacity. Finally.

The single most requested change to the M4 is now standard. The M4 EXT ships with an extended magazine tube delivering 7+1 capacity — built to carry more so you can push harder. Whether clearing rooms or defending ground, extended capacity means fewer reloads and no hesitation under pressure. The rugged oversized bolt release makes those reloads faster and more certain with gloves, cold hands, or under stress.

Five Positions. Full Control.

The 5-position telescoping stock adjusts length of pull from 9¼" to 14" without tools, so the gun fits correctly over body armor, a heavy coat, or a bare shoulder. Paired with the M4's pistol grip, it delivers rapid adjustment, superior control, and the rugged reliability the platform demands. A flush-cup QD sling mount is embedded directly in the stock for fast, snag-free sling attachment.

Flat Dark Earth: Built to Take Over

The M4 EXT is offered in H2O Titanium, MultiCam Black, and this Flat Dark Earth Cerakote — each finish selected for a mission rather than for looks. FDE covers both receiver and barrel in a hard, abrasion-resistant, non-reflective coating that keeps the gun low-visibility in arid, desert, and mixed terrain. No shine. No flash.

Sights, Optics, and Compliance

Factory ghost-ring sights provide fast, forgiving alignment at defensive distances, and an included Picatinny rail on a drilled-and-tapped receiver accepts red dots and magnified optics. The M4 EXT ships with a Modified choke tube for improved pellet density and consistent mid-range performance straight out of the box. The M4 EXT is 922(r) compliant.

Benelli M4 EXT 11788 Specifications

Who This Shotgun Is For

The M4 EXT is for the buyer who wants the genuine article. It is the same fighting shotgun trusted by military and law enforcement worldwide, updated with the capacity and adjustability modern users demand. It excels as a home defense shotgun, a patrol or entry shotgun, and a duty-grade training gun that will run hard for years without a rebuild. If you've been buying aftermarket tubes and stocks to get an M4 where you wanted it, the EXT arrives there from the factory — and stays 922(r) compliant doing it.

What's in the Box

• Benelli M4 EXT shotgun, FDE Cerakote, 18.5" barrel
• Modified choke tube installed
• Picatinny rail
• Owner's manual and Benelli case (packaging per current factory configuration)

Frequently Asked Questions

How is the M4 EXT different from the standard M4 Tactical?

Three changes: 7+1 capacity instead of 5+1, a 5-position telescoping stock (9¼"–14" LOP) instead of the fixed or collapsible options on the standard gun, and an oversized bolt release. Same 18.5" barrel, same A.R.G.O. action, same ghost-ring sights.

Is the M4 EXT 922(r) compliant?

Yes. Benelli lists the M4 EXT as 922(r) compliant as delivered.

What's the difference between the M4 EXT and the new M2-G1?

The M4 EXT uses the military-proven A.R.G.O. system and is Benelli's flagship tactical shotgun. The M2-G1 uses the newer R.P.O. (Rear Piston Operated) system and sits at a lower price point. A.R.G.O. remains the benchmark; R.P.O. is a newer design focused on cleaner operation and reduced maintenance.

Can I mount an optic?

Yes. A Picatinny rail is included and the receiver is drilled and tapped, so red dots and LPVOs mount directly with the correct footprint or mount.

What other finishes does the M4 EXT come in?

Three: MultiCam Black (SKU 11787), Flat Dark Earth Cerakote (11788), and H2O Titanium Cerakote (11789).