Lewis Machine & Tool 12.5 Piston Defender 2000. LMT MRP barrel system, SOPMOD stock, PRI Gas Buster charging handle and a Gemtech flash hider. This is a DSG demo weapon. It has an estimated round count of 3-4k. It is in used, good condition. A very reliable and good shooting weapon. Ships in a Triarc Flambeau hard case.