REMINGTON SHOTGUN SLING MOUNTING PLATE FOR "FBI" REMINGTON 870 The Remington "FBI" style shotgun sling mounting plate is designed for older Remington 870 shotguns that use a detent-ball magazine cap retainer located only at the front of the magazine tube. This part installs under the magazine cap, providing a secure forward sling-attachment point without requiring any modification to the barrel or magazine tube. It is built to interface properly with the older detent-style retention system and offers a durable, low-profile sling mounting solution for legacy 870 configurations. Fits older model Remington 870's that detent ball mag c Mfg: Remington