I have a Benelli M4. I love it. I considered an M2, but it is inertia only, and will kick harder than a gas operated. The M4 is both-inertia and gas. The other thing I realized about the benelli's is you have to hold on to them tight(ie. stock to the shoulder),if not, it won't cycle properly. I realize this when I'm trying to rattle off a magazine full of shells- you know, 5-6 rounds a second.