Add the LWRC PDW Stock Kit to your LWRCI 5.56 NATO or 6.8 SPC piston rifle to add that bit of flair or shorten the overall length. When stowed the PDW stock extends from the lower receiver by a scant 3.5" and just over 8" when deployed. The LWRC PDW Stock Kit is designed to work with gas piston AR-15's only and will not work with Direct Impingement Systems. IncludesPDW Stock Modified Bolt Carrier and Buffer (Firing Pin, Firing Pin Retainer, Cam Pin and Bolt sold separately)PDW Buffer SpringPDW wrenchAll necessary installation hardware and instructionsNote: Standard Version is compatible with all Standard/MIL-SPEC lower receivers. Not compatible with REPR Platforms.