I have a benelli M4 and a M3 I have shot my M3 quite a bit and I really like it only draw back is that the inertia recoil system does not allow me to put my sling that holds 15 shells on it and use it in semi-auto I have to either switch to pump mode or take the sling off (which is what I have done). Apart from that fact I really like it and plus I think I like it better without the sling. Ive had my M4 for two years I think but I have yet to shoot it , the only thing either shotgun has in extras is a mag. extender. I want a mossberg 590 also, thats a purchase I'll make in the future for sure. So what kind of shotgun do you have, and if you have more than one brand, which one is your favorite?