LWRCI Ultra Compact Stock Kit For Ar-15 Black. The stock kit includes the stock receiver extension index plate buffer recoil spring and castle nut. The systems components were designed to work together and should be installed together for reliable performance. The stock is lightweight and features integral sling attachment points easy one-hand adjustments and excellent cheekweld. The rubber buttpad prevents slippage during firing. The receiver extension has four positions to adjust the length of pull. Derived from our UCIW project it is a great option for shortening the overall length of your rifle. Overall length of the stock kit (including castle nut and index plate) measures 5.75" collapsed and 9" at maximum extension Specifications for LWRCI Ultra Compact Stock Kit For Ar-15: Manufacturer: LWRCI Color: Black Gun Model: AR-15 Gun Type: Rifle Package Contents: LWRCI Ultra Compact Stock Kit For Ar-15 The Lwrc Stock Kit Ultra Compact Black For Ar-15 is a quality addition to the LWRCI lineup. For more great deals on AR15 Stocks by LWRCI please browse our LWRC Gun Parts page. What firearm models does the manufacturer say LWRCI Ultra Compact Stock Kit For Ar-15 is compatible with? The manufacturer suggests that LWRCI Ultra Compact Stock Kit For Ar-15 is compatible with AR-15LWRCI 200-0092A01: Ultra Compact Stock Kit For Ar-15 Black