HAR Benelli M4 — 12 Gauge
FFL transfer required.
A Horizon-built Benelli M4, the gas-operated 12-gauge that set the combat-shotgun standard, set up for serious home defense with extended capacity, a Holosun dot, and a weapon light as a complete fighting system.
Reference HASS01 travels with your message.
Specifications
- Gauge
- 12-gauge, 3" chamber
- Action
- Gas-operated semi-automatic
- Barrel Length
- 18.5 in
- Capacity
- 7+1 (extended tube)
- Overall Length
- 38.5 in
- Weight
- 7.4 lb (bare)
- Finish
- Cerakote Graphite Black / phosphate internals
Build Components
- Barrel Horizon Arms Research
18.5" cylinder/IC, vent-rib delete, threaded for chokes
- Handguard Horizon Arms Research
M-Lok forend with heat shield and QD sling points
- Optic Holosun
HS510C open reflex on a low-profile rib mount
- Sights XS Sights
Tritium front bead with ghost-ring rear
- Magazine Tube Horizon Arms Research
Extended 7-round tube with clamp and sling mount
- Light SureFire
DSF-12 dedicated forend WeaponLight
- Stock Benelli
Factory M4 3-position telescoping stock
The Build Story
The shotgun, modernized for defense
A 12-gauge is still the most decisive close-range tool in the house, but the pump gun your grandfather carried left a lot on the table. The Benelli M4 is gas-operated, which bleeds off recoil and lets you stay on target through fast follow-up shots. We tune it to run everything from reduced-recoil buckshot to full slugs without short-stroking.
A fighting shotgun, not a hunting gun with a black stock
Capacity, control, and target acquisition all matter when it counts, so we build for them. The extended tube takes you to 7+1, the factory M4 3-position telescoping stock fits the shooter, and the Holosun dot over ghost-ring backups gives you both speed and a hard-iron fallback. The dedicated SureFire forend light puts white light exactly where the muzzle points.
Built complete, tested under recoil
Optic, light, sights, and sling hardware are installed, zeroed, and patterned before the gun ships. We run it hard through multiple loads, fast strings, and low light, because a defensive shotgun has to cycle and hit on demand. Hand-assembled, stress-tested, and proven the way you’d actually fight with it.
Ready to make this one yours?
Builds are configured to order around how you'll actually carry and use them. Start a conversation and we'll spec it with you.