Screw-On American Swivel Base w/2 Screws R-321

Screw-on American Swivel Base w/ 2 Screws. Blued steel swivel with CONVEX base is designed to be used with standard American detachable swivels. Attaches to the concave center rib of Side by Side shotguns and double rifles. Length: 1.500" Width: .375" Hole to Hole Spacing: 30mm / 1.18". Screws: M3 x 0.5mm

Please check the depth of the center rib to the top edge of the barrels before installing the swivel to the rib. If the rib is too deep, you will be unable to attach the QD swivel to the head as there will not be enough barrel clearance.