Here’s why. Most every Benelli semi-auto shotgun is inertia-operated—the M4 uses a gas system called ARGO, which I’ll get to later—which means the guns use recoil to function. When you pull the ...

Versions are available for the Benelli M4, Beretta 1301, Mossberg 930/940 (shown) and Remington 870 and V3 (some are offered in multiple lengths), and most can be installed or removed without the ...

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