KAK Industry was founded and incorporated in 2011 by Kurt Kosman to address a gap in the firearms market for quality, American-Made components at affordable, sustainable prices. AR-15 Rifle A2 Buttstock Kit Includes: AR-15 Rifle Spring, AR-15 Rifle Buffer, A2 Extension Tube, A2 Spacer, Assembly Screw, and Polymer Stock with Storage Compartment