GrovTec US Shotgun Side Mount Mossberg Swivel Stud Black. Mounts to accommodate right and left hand shooters. Specifications for GrovTec US Shotgun Side Mount: Manufacturer: GrovTec US Color: Black Gun Type: Shotgun Package Contents: GrovTec US Shotgun Side Mount Wrench Threadlocker What firearm models does the manufacturer say GrovTec US Shotgun Side Mount is compatible with? The manufacturer says that GrovTec US Shotgun Side Mount is compatible with Mossberg Model 500 Mossberg Model 935 Mossberg Model 835 Mossberg Model 590 Mossberg Model 930 Remington Model 870 Remington Model 11-87 Remington Model 1100 12 Gauge Remington Model 870 ExpressGrovTec US GTHM274: Shotgun Side Mount Mossberg Swivel Stud Black