Leapers, Inc. - UTG Model 4, Stock, Fits AR-15, Fixed Stock Assembly, with A2 Extension Tube, Recoil Spring, Buffer Assembly, Stock Spacer, and Screw, Black Finish RB-T469B Whether your in a state that requires a fixed stock or you simply prefer the solid feel of a quality M16A2 stock" the Leapers UTG Model 4 AR-15 fixed shoulder stock is just what you've been looking for! This complete kit includes a 4.8-ounce buffer" action spring" receiver extension" stock" butt plate" stock spacer" and stock screw" so all you need to do is install the buttstock on your receiver. The back end of the stock features a pocket opening perfect for storing a cleaning kit" or other small AR-15 parts and accessories.