The ARGO system, in particular, does an excellent job of reducing recoil.Īlso, these guns can be weighed down quite a bit and will keep running. You are also going to get less recoil that gets noticeably more comfortable with heavy-hitting slugs. This means lighter loads are more likely to cycle with fewer issues. They throw the bolt rearward and eject the fired round and cock the hammer. This gas propels the shot downrange, and a little is bled off to operate the shotgun.Ī gas port feeds gas to the pistons, which cycles rearward and has direct contact with the bolt. When the weapon is fired, gas is created by the exploding gun powder. The ARGO is a short-stroke, dual gas piston design. ARGO stands for Auto Regulating, Gas Operated. This gas-powered system was created by Benelli for the Marine Corps. The Benelli M4 doesn’t use a standard gas system but uses the ARGO system. Still better than a pump-action, but a little heartier than a gas-operated gun. Your average red dot and side-saddle aren’t going to mess it up, but I’m sure if you kept adding weight, you’d find the spot eventually.Īlso, inertia guns tend to be a little rougher recoil-wise. When a gun relies on recoil to operate, you have to be careful about weighing it down with optics and accessories. When you change the weight of a gun, you change the way it recoils. First, they are sensitive to weight changes. The downsides to inertia guns are few but should be noted. This means you can shoot and shoot and shoot, and your inertia gun will keep running like a clock. There are no ports, and all gas is expelled out of the barrel. Better yet, another reason to love inertia guns is how little maintenance they need. Inertia guns are great for waterfowling hunting and shooting clay birds because they are so dang light. The bolt then meets a recoil spring that sends the bolt back forward, and on its way, it picks up the next round and locks the bolt into the barrel. This ejects the spent shell and recocks the gun’s hammer. The spring is released because the spring is so strong the power of it rebounding causes the bolt body to unlock the rotating bolt head and throw the bolt rearwards. Benelli M2Īfter the shot leaves the barrel, the recoil force begins to dissipate. The difference in motion between the bolt and spring and the rest of the gun causes this super-strong spring to compress between the rear of the bolt and the bolt head. The bolt and inertia spring are basically free-floating and therefore stay put initially. When the gun fires, it recoils, causing all the fixed parts of the gun to move rearward. Inside the bolt is a very strong spring called the inertia spring. Sjogren’s shotgunīenelli uses the same principle but a simpler and more robust recoil system. He created about 5,000 semi-auto inertia-driven shotguns and was moderately successful. The inertia system works in a way that’s simple but complicated to explain.īenelli didn’t invent the inertia system, a man named Carl Axel Theodor Sjogren did in 1900. There are pros and cons to both systems when it comes to semi-auto shotguns. The M4 is Benelli’s gas-powered gun that uses the ARGO system. Benelliīetter yet, the system proved to be more reliable and simpler to produce than the old Browning long recoil design used in guns like the Browning A5.īenelli only stepped out of the inertia-driven box to produce the famed M4, which became the Marine Corps M1014 Joint Service Shotgun. These shotguns, like the M1, M2, and M3, proved to be reliable, fast cycling, and clean. Gasīenelli made their bread and butter on their rotating bolt inertia-driven designs.
Now that Beretta owns Benelli, though, the importation is easily taken care of by the massive Italian gunmaker. It’s not uncommon to find Benelli M1, M2, and M3 models with HK markings. HK and Benelli seemingly had a great relationship, and HK imported and marked Benelli shotguns for import for quite some time. GSG9 circa 1972, note the HK 512 and the MP5s. This gun was designed for tactical use, and apparently, the GSG 9 adopted them, as well as special police and military units in Spain, Portugal, and Austria. The HK 512 is a cool shotgun, but exceedingly rare. Me explaining to my normie friends how everyone owns everyone in the firearm industry
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