Blemished Bad Attitude Forged M4 / A4 Upper Receiver

These upper receivers will have cosmetic blemishes that do not affect function

********THERMAL FIT********

• • CNC Machined from a 7075-T6 forging
  • Mil-Spec Type Type 3 Class 2 anodizing
  • Dry film lube on the interior
  • Lugs held to the high end of the spec to help with a snug lower fit
  • M4 Feedramps
  • These are thermal fit receivers.  You will need to heat the receiver in order to install your barrel
    • Heat the receiver in an oven set at 250*.  Install the barrel and let it cool to room temperature before you install the barrel nut
    • GENTLY heat the front of the receiver with a propane torch.  Do not overheat the receiver.  You need only to heat it slightly to install the barrel.  Install the barrel quickly and let cool to room temperature before you install the barrel nut.
  • Bad Attitude Department is not responsible and will not replace uppers damaged due to improper heating or installation.  If you run in to a problem, let us know and we can help you out. 
  • Fits all standard Mil-Spec dimension components
  • Custom engraving available

If added, T-Marks will be laser engraved in white.