Allen Opp 2 Support Shooting Rest Black. It has a large rubber rear support and an overmolded support head that helps to reduce skidding and provides a stable shot. The lock knob keeps the elevation adjustment from changing unexpectedly. The OPP-2 Shooting Rest also has a rear rubber support pad helps prevent the support pad from sliding around. These simple additions to your shooting bag make all of your shooting woes a thing of the past. Specifications for Allen Opp 2 Support Shooting Rest: Manufacturer: Allen Color: Black Fabric/Material: Metal Features of Allen OPP 2 Support Shooting Rest Solid Metal Spine. Fine Elevation Adjustment Screw. Elevation Locking Screw. Overmolded Support Head. Rubber Rear Support. Package Contents: Allen OPP 2 Support Shooting Rest Allen 21920: Opp 2 Support Shooting Rest Black