The Adaptive Tactical Tac-Hammer RM4 Takedown Rifle Stock is loaded with innovative features that add portability and convenience to their popular RM4 stock. This lightweight" compact stock was developed to fit perfectly with the factory Ruger Takedown 10/22 rifle. Compatible with factory tapered barrels only. Patented Stowaway accessory rail is concealed in the forend. When reversed" the rail is available for flashlight" bi-pod or other accessories. Get custom length-of-pull for proper fit and improved performance with the adjustable M4 type butt-stock" equipped with ambidextrous storage compartments for two spare Ruger 10-round rotary magazines. The RM4 Takedown Rifle Stock fits easily inside Ruger's factory bag" or in Copper Basin's low-profile 10/22 Takedown Backpack. The pistol grip is designed to fit the spring-loaded TacTRED monopod for increased stability (sold separately).