Kit contains RRA Tactical CAR Stock, 6-Position PDS Receiver Extension with threaded end cap and internal storage, and Side Folding Hinge/Adapter unit. This kit is intended ONLY for use in converting legally registered LAR-PDS pistols to stocked SBRs. NOTE: This kit is not compatible with other bufferless platforms due to the means of attachment to the proprietary LAR-PDS lower receiver.