Panzer Arms M4 Speed Pro 12 Gauge Semi-Auto Shotgun – 18.5" Ported Barrel, 3" Chamber, 5+1
The Panzer Arms M4 Speed Pro brings the proven ARGO dual-piston system of the USMC Benelli M4 to a competition-ready package. Built on a 7075-T6 aluminum receiver with a full-length Picatinny rail, it adds a machined aluminum M-LOK forend, oversized ambidextrous controls, and a lightened bolt carrier for faster follow-up shots. A 3" chamber, ported 18.5" barrel, and Mobil-pattern choke system (including an IC choke) keep this 12-gauge ready for duty, sport, or home defense.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent – clean, mirror finish, no signs of wear.
Specific Condition Notes: This shotgun shows light handling wear and a few minor surface scratches that do not affect performance.
What’s Included
- Two Mobil-pattern steel choke tubes (spares)
- Factory T-handle choke wrench
- Plastic accessory case for choke kit
The auto-regulating gas-operated (ARGO) action uses twin pistons near the chamber to cycle cleanly with both 2 ¾" and 3" loads, reducing fouling in the receiver and ensuring reliability across a wide ammo range.
An 18.5" 4140 steel barrel is factory-ported to tame recoil and muzzle rise. It is threaded for Mobil-pattern chokes, and the included IC choke gives balanced spread for defensive or practical-shooting use.
The Speed Pro’s aluminum M-LOK forend provides rigid mounting points for lights or other accessories without adding unnecessary weight. A full-length top rail carries the protected blade front and ghost-ring rear sights while leaving room for optics.
A three-position buffer tube pairs with the telescoping polymer stock to dial in a short 9.5" length of pull—ideal for body armor, smaller shooters, or tight maneuvering. The stock adds a QD sling socket, and the knurled ambi charging handle speeds manipulations on either shoulder.