This is the latest HOG Saddle model with some improvements from the original design.List of improvements:Opens 1/4" wider than original model.(2 11/16" Open 1 1/2" Closed)Incorporates a retention button screw to prevent unintentional disassembly in the field.Weighs less than 16 ounces.Added cut-outs to the base of the HOG Saddle. These narrow slots better integrate with tripod heads or QR plates that have anti-rotation video pins.MOD7 Specs:CNC machined from a solid block of aluminumBlack oxide stainless steel bolt and guide rodsHard anodized finish (a resilient surface which serves as an excellent base coat for custom camouflage paint)1/4-20 stainless steel mounting threads and 3/8-16 back up threadsCNC machined torque knob assembly with retention button screw to prevent disassembly in the field (opens 1/4in wider than previous model)Stainless steel noise dampening tension spring1/4 inch thick recessed urethane pads specifically engineered to absorb rifle recoil and reduce muzzle jumpAnti-rotation slots to accept tripod QD plates that have video pinsSuperior resistance to corrosion