This is a UTG PRO AR-15 Ops Ready S4 Mil-spec Stock molded from impact resistant high strength matte black polymer. Its unique 4.28″ length with 4 position adjustability provides comfortable length of pull and ease of shouldering firearm when wearing a load bearing vest or plate carrier system. It is built for heavy duty use with the tightest tolerance controls to provide the most secure fit and function

16″ 5.56 AR-15 Magpul Moe M-Lok Carbine Upper No BCG or Charging handle
Aero Precision Adjustable Gas Block – .750 Low Profile 
