Benelli M2-G1 Tactical: Gas-Operated, $1,829 to $2,149

Benelli introduced the M2-G1 Tactical on August 17, 2026 as a five-SKU family of 18.5-inch 12 gauge defensive shotguns running an operating system the company had not shipped before. All five chamber 2 3/4-inch and 3-inch shells, wear ghost-ring sights over a receiver-top rail, and carry an M-LOK compatible forend, a beveled loading port, QD sling mounting positions, enlarged controls, and Parkerized operating components. Pricing splits on two variables only: capacity and stock.

The headline is not the feature list. It is that Benelli put a gas system on the M2. Since the model arrived in 2004 the M2 has meant Inertia Driven, the recoil-cycled mechanism Benelli has built on since 1967 and the reason its semi-autos run light and clean. The M2-G1 taps gas instead, which changes the gun's ammunition behavior, its recoil impulse, and where fouling ends up.

Two of the five are fixed-stock guns and three run the 5-position collapsible stock. Capacity is 5+1 on the entry model and 7+1 on the other four. The $200 spread between the gray collapsible model and the FDE or MultiCam Black versions buys finish alone.

R.P.O. stands for Rear Piston Operated, and the name describes geometry rather than a new physical principle. Benelli mounts dual short-stroke pistons close to the chamber, where they capture the gas that cycles the action, and puts the recoil system in the stock instead of running it forward under the barrel or around the magazine tube. Benelli's stated payoff for collecting gas closer to the chamber is smoother control and longer sustained performance than forward-mounted designs deliver.

This is now Benelli's third operating system in the tactical catalog, and the three are genuinely different machines. Inertia Driven, which the M2 Tactical uses, taps no gas at all: the bolt cycles on recoil energy through a spring-loaded rotating bolt head. A.R.G.O., the auto-regulating gas system in the M4, uses two stainless pistons acting directly on the bolt. R.P.O. is a gas system like A.R.G.O., but with the pistons moved rearward and the recoil spring relocated into the buttstock.

The buyer-relevant consequence sits in the ammunition. An inertia-driven shotgun needs the shell to generate enough recoil to work the action, which is why the M2 Tactical is documented as sensitive to light target loads and happiest on full-power defensive ammunition. A gas gun meters its energy from the port instead, so the load window is set by port sizing rather than by how hard the shell shoves. That distinction is the whole reason gas guns dominate our tactical semi-auto shotgun rankings, where the M2 was the sole inertia entry in the field.

The tradeoff runs the other way on cleanliness. Inertia guns keep propellant gas and its residue out of the action entirely, which is the single best argument for the mechanism and the reason it tolerates neglect. Any gas gun, R.P.O. included, routes fouling into the operating system. Benelli placing the pistons near the chamber puts them in the hottest, dirtiest part of the gas stream, and the counterargument the company offers is a shorter, more direct gas path rather than an absence of fouling.

The M2-G1 lands between the Benelli M4 and the Beretta 1301 Tactical Mod.2 on price, and it competes with both on mechanism for the first time. Against the M4, the pitch is a modern feature set at a lower entry price. Against the 1301, it is a gas gun from Benelli with a factory rail and M-LOK forend, which is precisely the combination the 1301 has been winning on.

The M4 keeps the record, and that is not a small thing on a duty gun. It has been in service since 1999 and the aftermarket has had twenty-plus years to build for it, which is why our M4 upgrade guide runs as long as it does. The M2-G1 launches with a factory M-LOK forend and a factory rail, so it needs less of that aftermarket to reach a working configuration, but it has no service history at all. Buyers who weight proven over new should read the NTOA rating for what it is: a structured evaluation by working officers, not a decade of duty cycles.

Against the Beretta 1301 Tactical Mod.2 at $1,666.67, the M2-G1 is the more expensive gun at every trim. The 1301 has the reputation for the fastest cycle time in the class and a large existing accessory ecosystem. What the M2-G1 offers against it is Benelli build quality on a gas action, a 7+1 tube standard on four of five SKUs, and a collapsible stock option at the factory. Run both against your other candidates in the platform comparison tool before committing, since the spread between these three guns is mostly about which compromises you are buying, not which one is better built.

Value inside the family concentrates in the $1,829 gray fixed-stock 5+1. It is the same action, the same barrel, the same sights, and the same forend as the $2,149 MultiCam Black gun. The $320 between them buys exactly two things: two rounds of tube capacity and an adjustable stock. For a shooter buying one shotgun for one house, neither is worth $320, so the decision rule is to start at the bottom of the range and only move up when one of the two upgrades solves a problem you actually have.

Step up to the $1,949 fixed-stock 7+1 if the gun is going in a patrol rack or a truck, where a longer tube costs nothing you care about and reloads are slower to reach. The $2,049 collapsible model earns its premium only when more than one person of meaningfully different size shoots the gun, or when it rides in body armor where 13 inches of pull is too long. The FDE and MultiCam Black guns at $2,149 are the same shotgun as the $2,049 one in a different finish, which is a legitimate thing to want and a poor use of $100 if you do not.

For readers cross-shopping outside the Benelli line entirely, the full field of pump and semi-auto defensive options sits in our home defense shotgun guide, and a $1,829 entry price puts the M2-G1 well above where a competent defensive shotgun starts. The gas system is the reason to pay it, not the badge.