marwachineUsed. Good condition but upper receiver has cerakote wear on rear pivot pin lug and rear outside throat of buffer channel (please see photos). Mueller Dogbone was purchased from Thoroughbread as a surplus upper receiver. Buffer tube is like new and in very good condition. Great clone-ish build components. Mueller Forge Dogbone M4 Upper Receiver and MILSPEC 6-Position Buffer Tube - Both professionally cerakoted in Midnight Bronze. $85 (CONUS shipping included) - no trades, price is firm PPFF or Zelle preferred
