Several manufacturers have introduced dedicated waterfowl (and in some cases, upland) shotguns with receivers that are pre-cut to directly mount red-dots — no Pic rail needed. Both the Mossberg 940 JM ...

When introduced in 2004, the PX4 Storm was to be the polymer-frame successor to the iconic Beretta 92FS ... has the company's proprietary low red-dot optic mount, a flat trigger bow, match ...