Benelli M4 H20 18.5" Shotgun w/ 5-Position Stock, 7+1 Extension Tube & Night Sights GEN 2

Benelli M4 H2O 18.5" 12GA Shotgun – 5-Position Stock, 7+1 & Night Sights | 11733

The Benelli M4 H2O 11733 is a highly equipped law-enforcement configuration of the M4 platform, combining an 18.5-inch barrel, 7+1 capacity, 5-position telescoping stock, Multirail forend, tritium night sights, and the proven Benelli A.R.G.O. gas operating system.

What makes the 11733 stand out is how much of the typical M4 upgrade path is already handled from the factory. Instead of starting with a basic 5+1 M4 and immediately looking for a collapsible stock, full-length magazine setup, rail system, or upgraded sights, this configuration brings those features together in one factory package.

H2O Configuration

The 11733 features Benelli's H2O-style titanium-colored treatment on the receiver and barrel, paired with black synthetic furniture. The contrasting finish gives the shotgun its distinctive H2O appearance while separating it from traditional black M4 configurations.

For buyers specifically looking for the H2O version with the newer 5-position stock and full-capacity magazine setup, manufacturer part number 11733 identifies this configuration.

5-Position Telescoping Stock

The 11733 uses Benelli's straight 5-position telescoping stock, giving the shooter considerably more adjustment than a fixed-stock M4.

Multiple stock positions allow the shotgun to be tailored around body armor, equipment, shooting stance, or individual preference while retaining the familiar pistol-grip layout of the M4 platform.

7+1 Magazine Configuration

This M4 uses a full-capacity tubular magazine system providing a listed 7+1 capacity with 2¾-inch shells.

For buyers comparing M4 configurations, this is an important distinction. The higher-capacity setup is already incorporated into the shotgun rather than requiring an immediate magazine-tube conversion after purchase.

Benelli Multirail Forend

The 11733 is equipped with Benelli's Multirail front-end system, giving the shotgun a more accessory-ready configuration than the traditional polymer M4 handguard.

The rail system provides mounting capability for compatible accessories while keeping the shotgun centered around factory Benelli components.

Tritium Night Sights

The 11733 is equipped with a tritium front post and a ghost-ring rear sight with tritium inserts. The combination provides the familiar M4 sight picture with enhanced visibility in reduced-light conditions.

A Picatinny rail on top of the receiver also provides a factory mounting surface for a compatible red-dot sight or other optic.

Benelli A.R.G.O. Operating System

At the heart of the M4 is Benelli's Auto-Regulating Gas-Operated, or A.R.G.O., system. The piston-driven action uses dual short-stroke pistons positioned close to the chamber to operate the shotgun.

The system was developed specifically for the M4 platform and remains one of the defining mechanical features behind its long-standing use in military and law-enforcement applications.

Built Around the M4 Platform

The 11733 keeps the proven M4 action while adding many of the features experienced M4 owners usually look for first: increased capacity, greater stock adjustment, improved accessory mounting, and night sights.

That makes it a particularly complete factory configuration for professional users and M4 buyers who do not want to build the same setup one component at a time.

Key Features

• Manufacturer: Benelli
• Model: M4 LE H2O
• Manufacturer Part Number: 11733
• UPC: 650350117332
• 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 with 2¾" Shells
• Magazine: Tubular
• Stock: 5-Position Telescoping Stock
• Stock Material: Black Synthetic
• Forend: Black Synthetic Multirail
• Front Sight: Tritium Front Post
• Rear Sight: Ghost Ring with Tritium Inserts
• Optics Mount: Receiver-Mounted Picatinny Rail
• Receiver / Barrel Color: Titanium
• Length of Pull: 14.375"

For buyers who want an M4 with the major tactical upgrades already installed at the factory, the Benelli M4 H2O 11733 is one of the more complete configurations available. The 5-position stock, 7+1 magazine setup, Multirail forend, tritium sights, H2O styling, and proven A.R.G.O. action give it the features that matter without turning a standard M4 into an immediate parts project.

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