Monstrum Winchester 12-Gauge Shotgun Shell Carrier w/ Picatinny Rail V2 Mount Compatible with Winchester SXP Defender Shotguns Black. Built for use with Winchester SXP Defender shotgun platforms the shell holder accommodates up to six 12 gauge shotgun shells. Unit installs into the pin holes on the side of the receiver with no additional gunsmithing required. Not compatible with other shotgun models. Specifications for Monstrum Winchester 12-Gauge Shotgun Shell Carrier w/ Picatinny Rail V2 Mount: Manufacturer: Monstrum Color: Black Gun Make: Winchester Features of Monstrum Winchester 12-Gauge Shotgun Shell Carrier w/ Picatinny Rail V2 Mount Built for use with Winchester SXP Defender shotgun platforms. Unit installs into the pin holes on the side of the receiver with no additional gunsmithing required. Accomodates up to six 12 gauge shotgun shells. Not compatible with other shotgun models. Package Contents: Monstrum Winchester 12-Gauge Shotgun Shell Carrier w/ Picatinny Rail V2 Mount Monstrum ZH142: Winchester 12-Gauge Shotgun Shell Carrier w/ Picatinny Rail V2 Mount Compatible with Winchester SXP Defender Shotguns Black