Utg stock assembly ar-15 fde 6 position mil-spec FEATURES-Polymer Stock made from impact resistant high-strength material in flat dark earth color-Mil-spec diameter extension tube made from aircraft aluminum with rolled threads, hard anodizing plusFlat Dark Earth CerakoteA(R) Finish for best corrosion and wear resistance-Built for Heavy-duty operations with tightest tolerance control-Stock assembly complete with action spring, buffer assembly, tear-drop ring & castle nut Other Features: Includes buffer, spring, mil-spec buffer tube, end plate and castle-nut, made in the usa