PWS M107 Mod 2 piston upper. Complete upper receiver. 7.5” barrel .223 Wylde. Roughly 400 rounds through it, still in great condition. Integrated adjustable gas block. Includes Streamlight protac, swampfox liberator, radian raptor charging handle, BCM KAG is on it now and will be included (not pictured). $800 for the complete package. Not looking for trades. Any questions let me know.