Works great without any mechanical issues. Comes with Upgraded CNC TNT LM4/Masada Hopup unit, Magpul Handstop, steel flash hider, repro magpul rear sight, and one black PTS LM4 magazine. The only cosmetic issue is that the cheek well on the stock is missing. Does not affect any function. Parts list as follows: *KWA/PTS Masada GBBR $420 *TNT LM4 Hopup Unit $65 *Magpul handstop $25 *No longer comes with Steel flash Hider *Repro magpul rear sight $10 Total $520 Asking $400. You save $120 off new!