The M2 boasts an adjustable ComforTech recoil-reducing pad that cushions the heavy inertia recoil. While both the M2 and M4 share the same weight and barrel length, the M2 weighs 6.7 pounds, as the inertia mechanism is lighter than the M4’s ARGO with an overall weight of 8.7 pounds, making it the heaviest Benelli product to date.īoth models have an oversized trigger guard, so you can use gloves. The M2 runs on the tried-and-true Benelli Inertia, but the M4’s is more powerful and reliable overall, so one point goes to the M4. Both the M2 and M4 cycle 2¾- inch and 3-inch shells excellently. This unique system is very reliable, and it effortlessly handles 3-inch buckshot shells and field loads. The two gas-operated pistons work well with this system, and it’s self-cleaning as well, meaning it produces less gunk, so it’s easy to clean. The ARGO works with two highly reliable short-stroke gas pistons that give you an edge in fast follow-up shots along with a faster cycling rate, greatly lowered felt recoil, and lasting reliability. Video can’t be loaded because JavaScript is disabled: Benelli Inertia Driven® Operating System ()