M1913 Scope Rail Remington 870/1100
Back on stock now
https://www.sjhardware.com/product/m1913-scope-rail-remington-870-1100/

One-piece, MIL-STD 1913 Picatinny rail allows mounting a variety of optics and tactical sights on popular Remington shotguns. Streamlined, low profile design installs to the top of the receiver for a smooth “built-in” appearance. Four steel, Allen head screws secure rail to receiver for exceptional holding power. Precision machined from 6061-T6 aluminum, then mil-spec Type III hard coat anodized for added strength and cerakoted graphite black
. Fits shotguns with factory drilled and tapped receivers or receivers custom drilled and tapped