Includes: FAL Receiver Block (#FALRB), folding stock mechanism (#FSM). Ultra Light Modular stock (#UL-M), 1/2" Recoil Pad (#RP1/2), CAR stock adapter (#PN), 1 1/4" ambi sling mount (#UM 1.25) and all hardware needed to install this stock. No modifications to your FAL are necessary. Stock length with A1/A2 extension tube is 11.25" long. Length of stock is measured from the front edge of the CAR adapter to the end of the stock butt, with recoil pad installed. The butt clamps to the outside diameter of the extension tube allowing the extension tube to be cut to any length for a custom fit. Further, once the extension tube back end has been cut off, small tools or a cleaning kit can be stowed inside of it. All ACE FAL folding and fixed stock sets require buying and converting your FAL to a "Para" type recoil system not included, and not currently available through ACE.