Model 923 Features The Model 923 has raptor feet for locking down into just about any surface in any conditions. It also has a quick release MIL-STD-1913 Picatinny head for quick and easy take down and storage. This model is just like the RD-923 that is used by the US military except that the legs on this unit are not spring-powered. Model 923 Specifications Mounts to Picatinny rail 912 legs Claw feet Non spring powered legs