This is the mag clamp only. Made by Uncle Mikes. One unit and hardwear, screw, nut, and lock washer. This came off a shotgun so it is used. It looks very good. It looks like the factory Remington unit. I'm sure you could use it on other shotguns as well, but it is made, and marketed for the R870P. It does not ingage the groove found on R870 extentions.
Paypal no fee