The Bag Rider SL is a bolt on addition to the Arisaka Stock Angle Adapter SL that provides additional functionality with three important features: Provides greater surface area for riding on top of rear rifle bags. Provides a hooked rear surface to facilitate modern precision shooting techniques by providing the support hand a solid point of contact on the rifle stock. Adds a bottom facing QD sling mount socket for competition use, allowing the user to attach a bag to the rear of the rifle quickly and easily. Mike Olivella from Praecore Performance was the catalyst for the Stock Angle Adapter and the inspiration for the Bag Rider: The Stock Angle Adapter is Mfg: Arisaka Defense