The Sparta stock conversion offers the owners of Ruger Mini-14/Mini-30/6.8 Ranch* rifles the convenience of a pistol grip stock, with an adjustable length-of-pull, and adjustable cheek-riser. Equipped with a full-length, aluminum top- rail designed to M1913 specifications, it offers a virtually limitless ability to accommodate various "iron" and "glass" sighting systems. Constructed from a proprietary, Zytel-based, carbon-fiber filled, polymer, the stock is impervious to all common firearm solvents and lubricants. The stock is equipped with four (4) hard points for push-button, quick-detach sling-swivels, and has a storage compartment in the pistol grip. The fore-end has pre-molded hard-points for a rail at the six o'clock position requiring only minor drilling to accommodate the mounting hardware (rail and mounting hardware not included). Features Carbon Fiber Reinforced Polymer Construction Full Length Aluminum Top Rail Picatinny Rail Height Compatible With Same-plane AR-15 Flip-up Sights Four-position Collapsible Buttstock Seven-position Adjustable Cheek Riser Four Integral Hard Points for Quick Detach Sling Swivels Removable Recoil Pad Grip Storage Compartment Unique spring-loaded filler to take up the gap between the trigger-guard and pistol-grip