Briley Shotgun Magazine Extension w/Swivel Benelli/Breda Semi-Auto +6 Rounds Carbon Fiber Black TSPA-102CSW. The carbon tube has a Delrin collar. Barrel clamp and spring included. Extensions are sold with a black anodized finish on the aluminum but Blue Gold and Red is available on request and will take approximately three weeks. Note: The clamp spacer position on the extension is good for any barrel 24 inches or longer. Shorter barrels will require custom positioning of the spacer. Specifications for Briley Benelli/Breda Semi-Auto +6 Rounds Shotgun Magazine Extension w/Swivel: Manufacturer: Briley Color: Black Finish: Carbon Fiber Fabric/Material: 6061 Aluminum Magazine Capacity: 6 Round Gun Make: Breda Benelli Gun Model: Benelli Super Black Eagle III Benelli Super Black Eagle II 12 Gauge Benelli Super Black Eagle 12 Gauge Benelli M1 Benelli M2 Features of Briley Benelli/Breda Semi-Auto +6 Rounds Shotgun Magazine Extension w/Swivel Benelli M1 M2 Super Black Eagle I II & III and Super 90 Breda Package Contents: Briley Benelli/Breda Semi-Auto +6 Rounds Shotgun Magazine Extension w/Swivel What firearm models does the manufacturer say Briley Benelli/Breda Semi-Auto +6 Rounds Shotgun Magazine Extension w/Swivel is compatible with? The manufacturer suggests that Briley Benelli/Breda Semi-Auto +6 Rounds Shotgun Magazine Extension w/Swivel is compatible with Benelli M2 Benelli M1 Benelli Super Black Eagle 12 Gauge Benelli Super Black Eagle II 12 Gauge Benelli Super Black Eagle IIIBriley TSPA-102CSW: Shotgun Magazine Extension w/Swivel Benelli/Breda Semi-Auto +6 Rounds Carbon Fiber Black