Black River Manufacturing SBE 3/M2 Furniture Kit Gloss Carbon Fiber. This stock set comes with Black River Manufacturing patented SHOCK FORCE recoil system. This set somes standard with a RED stiff springs which are perfect for your 3 1/2 in shells and under. Their SHOCK FORCE system allows you to finally shoot inertia guns in comfort. This set also comes with their mid and flush mount cheek pads so you can customize it for the perfect fit. Two of their preimum sling mounts also come standard. Box Contents: Stock SHOCK FORCE Recoil Pad Flush Mount Cheek Pad Mid Cheek Pad 2 Sling Swivels Mounting Hardware and Shims. Specifications for Black River Manufacturing SBE 3/M2 Furniture Kit: Manufacturer: Black River Manufacturing Gun Model: Benelli M2 Benelli Super Black Eagle Gun Type: Shotgun Stock/Brace Material: Aluminum Gun Make: Benelli Number of Sling Points: 2 Features of Black River Manufacturing SBE 3/M2 Furniture Kit System: Shock Force Lifetime warranty Package Contents: Black River Manufacturing SBE 3/M2 Furniture Kit Black River Manufacturing BRSMX003: SBE 3/M2 Furniture Kit Gloss Carbon Fiber