Benelli M4 EXT Review: Capacity Unleashed

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Same proven M4 heart with more of what matters: a factory 7+1 tube, a 5-position collapsible stock, and a bigger bolt release. We ran it hard, ghost loaded it to nine, and logged what broke in, what didn’t, and what Benelli should still tweak.

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Benelli didn’t reinvent the M4. They finally shipped the features serious users kept adding. The M4 EXT brings a factory 7+1 tube, a five-position collapsible stock with integrated pistol grip, and an oversized bolt release that is fast to find with gloves. Underneath is the same ARGO dual short-stroke piston system that made the M1014 a legend. Chambering is 12 gauge for 2 3/4 and 3 inch shells. Finish choices are H2O, FDE, and Multicam Black.

Benelli M4 EXT in H2O finish with 18.5 inch barrel and factory 7+1 tube
M4 EXT in H2O. 18.5 inch barrel, interchangeable chokes, factory 7+1 tube.
Full on-range review: capacity drills, ghost load demo, slug select, and low-recoil testing.

The new bolt release is the right move. It is drilled and tapped with a large paddle that speeds reloads and remedial action. The stock’s five positions give you real LOP solutions for armor, winter layers, or vehicles. The pistol grip is rubber over-molded with enough traction to lock the gun without tearing up hands.

Closeup of Benelli M4 EXT oversized bolt release and pistol grip
Oversized bolt release is fast and positive. Integrated pistol grip controls muzzle rise during strings.

Two asks for the next revision: the charging handle should be slightly larger in diameter and project farther so you can get a full purchase without fighting the enlarged bolt release. Also, hog the loading port a bit. Most competition-tuned guns do this and it speeds quad-loads or emergency topping off.

Benelli M4 EXT receiver and loading port view
Receivers stay classic M4. I’d open this loading port for faster stuffing under stress.

Out of the box, dry, the gun had one stumble on the very first ghost-loaded round. After a few tubes the EXT smoothed out and ran clean. With standard buck and slugs it chugs. It did not cycle ultra-light low-recoil 980 fps birdshot. That aligns with what I’ve seen on many gas shotguns. After break-in and a little oil, borderline loads often move from “almost” to “yes,” but I don’t count on gamer ammo for duty.

Benelli M4 EXT ghost ring sights with protected front post and white dot
Ghost rings with a protected white-dot front are fast on steel and precise enough for slug work.
Benelli M4 EXT top rail ready for red dot optics
Pic rail is ready for a duty red dot. Night use with an IR laser is a natural pairing.

Factory capacity is now 7+1. If your policy and mission set allow, the EXT will also stage one round on the lifter while you chamber another for a total of nine. Nothing protrudes past the muzzle. The shell release lever enables cruiser-ready storage with a full tube and an empty chamber.

Benelli M4 EXT showing lifter and shell release lever for cruiser ready and slug select
Shell release lever makes cruiser-ready staging and slug-select drills straightforward.
Benelli M4 EXT five position collapsible stock with QD sling sockets
Five positions cover armor to T-shirt. QD sockets are where they should be.

The rear ghost ring adjusts for windage and elevation using a shell rim. The front post is guarded, with a bright white dot. The crossbolt safety is large and easy to off-safe with the trigger finger. Re-engaging from a firing grip requires breaking the grip for most hands. Teardown remains simple: unscrew the cap, slide the barrel and operating system forward, drop the single receiver pin to remove the trigger group. Maintenance is quick.

Benelli M4 EXT ARGO dual short stroke gas pistons under handguard
Inside is the ARGO dual short-stroke piston system. Fewer parts, easier cleaning, soft recoil.

“The M3 has long been the standard by which all other tactical shotguns have been judged. Now, with enhanced capacity, greater adjustibility and new colorations, the M4 continues to set the bar at the highest level for tactical shotgun performance and dependablity.” — Timothy Joseph, Benelli Vice President of Marketing

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ModelBenelli M4 EXT Tactical
ActionSemi-auto, ARGO gas system
Chamber12 gauge (2 3/4 and 3 inch)
Capacity7+1 (ghost load capable for 9 total)
Barrel Length18.5 in
Sight SystemGhost ring rear, windage-adjustable
Optic CompatibilityPicatinny rail
StockTelescoping, 5-position
GripIntegrated pistol grip
FinishesH2O, FDE, Multicam Black
Compliance922R compliant
Average Weight8.4 lbs
MSRP$2,599
  • Pros: Proven ARGO reliability with full-power ammo, factory 7+1 capacity, ghost-load friendly, five-position stock fits armor, oversized bolt release, easy fieldstrip, protected sights that print slugs on call.
  • Cons: Charging handle should be bigger, loading port deserves a factory bevel, ultra-light low-recoil birdshot did not cycle out of the box, premium MSRP.
Benelli M4 EXT muzzle support band and mag tube reinforcement
Reinforced bands tie the mag tube to the barrel assembly for durability under heat and hard use.
Benelli M4 EXT ejection of spent hulls during live fire
Live-fire reliability testing. The EXT slung hulls with authority as the action broke in.

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