Overview
Benelli M4 EXT 18.5" 12GA H2O Shotgun – 5-Position Stock & 7+1 Capacity | 11789
The Benelli M4 EXT 11789 takes the proven M4 platform and adds the factory features many shooters have traditionally upgraded on their own. This 12-gauge semi-automatic configuration combines an 18.5-inch barrel, 7+1 capacity, 5-position telescoping stock with integrated pistol grip, oversized bolt release, ghost-ring sights, Picatinny optics rail, and Benelli's distinctive H2O finish.
The EXT is more than a cosmetic variation of the standard M4. Benelli developed this version around increased capacity, improved stock adjustment, and faster access to the controls while retaining the same A.R.G.O. operating system that defines the M4 platform.
Factory 7+1 Capacity
The M4 EXT comes from the factory with a 7+1 capacity, eliminating the need to immediately replace or extend the magazine system to reach the configuration many M4 owners prefer.
For buyers comparing M4 variants, this is one of the biggest advantages of the EXT. The full-capacity setup is already part of the factory configuration rather than an aftermarket modification.
5-Position Telescoping Stock
The 11789 is equipped with Benelli's 5-position telescoping stock and integrated pistol grip. The multiple stock positions allow the shooter to adjust the fit around body armor, equipment, shooting stance, or personal preference.
Compared with a fixed-stock M4, the additional adjustment gives the shotgun considerably more flexibility while keeping the familiar pistol-grip layout.
Oversized Bolt Release
One of the most practical updates on the M4 EXT is the oversized bolt release. The larger control surface is easier to locate and operate quickly, particularly when wearing gloves or working under less-than-ideal conditions.
It is a simple improvement, but one that directly affects how the shooter interacts with the shotgun during loading and operation.
H2O Finish
The 11789 is the H2O configuration of the M4 EXT. The light-colored finish gives this model a distinctive appearance while separating it from the Flat Dark Earth and MultiCam Black versions of the EXT.
For buyers specifically looking for the current factory H2O M4 EXT configuration, manufacturer part number 11789 identifies this model.
Ghost-Ring Sights & Picatinny Rail
The M4 EXT uses a ghost-ring rear sight with windage adjustment, giving the shotgun the familiar tactical sight picture associated with the M4 platform.
A Picatinny rail mounted along the top of the receiver provides a factory mounting point for a compatible red-dot sight or other optic.
Benelli A.R.G.O. Operating System
At the heart of the M4 EXT is Benelli's Auto-Regulating Gas-Operated, or A.R.G.O., system. The dual short-stroke piston design is positioned close to the chamber and is engineered to provide dependable semi-automatic cycling across compatible loads.
The EXT keeps this established M4 operating system while adding the capacity, stock adjustment, and enlarged controls many users wanted from the factory.
Key Features
- Manufacturer: Benelli
- Model: M4 EXT
- Manufacturer Part Number: 11789
- UPC: 650350117899
- Gauge: 12 Gauge
- Action: Semi-Automatic
- Operating System: Benelli A.R.G.O. Gas System
- Barrel Length: 18.5"
- Chamber: 2¾" and 3"
- Capacity: 7+1
- Stock: 5-Position Telescoping Stock
- Grip: Integrated Pistol Grip
- Controls: Oversized Bolt Release
- Sights: Ghost-Ring Rear Sight
- Optics Mount: Picatinny Rail
- Finish: H2O
- Average Weight: Approximately 8.4 lbs.
- Compliance: 922(r) Compliant Factory Configuration
For buyers who want an M4 with the most commonly requested upgrades already incorporated at the factory, the Benelli M4 EXT 11789 is a particularly complete configuration. The 7+1 capacity, 5-position stock, oversized bolt release, H2O finish, optics-ready receiver, and proven A.R.G.O. action give the shotgun a modern factory setup without requiring an immediate list of aftermarket changes.
