We are now making our HAO gen II M4 receiver. It have the later era profile of M4.

Now opening for pre-order. 

Before we begin the stamping and anodizing. We open our customer to choose if you want to have the full blank receiver that allows you to make custom engraving by yourself. Or no anodizing option, so you can apply whatever color you want.


Pre-order of no stamp (blank) receiver stop by March 8th. We should be begin our stamping work by then.


Final product E.T.A by April.



The most simplest receiver but also the hardest , classic receiver. HAO present you the Colt's M4A1 receiver set for PTW.
When the high precision CNC machine centre meet A7075-T6 alloy billet is not enough anymore for our PTW user, then is the time for our mighty hydraulic pressing machine with the pony stamp on it.

We just can't only provide you the highest standard product but also the masterpiece of the milsim industrial.


USGI Colt's M4A1 genI/II set for PTW

Color: Black
  • -CNC milled receivers from alloy 7075-T6 billet with stamping mark
  • -Dust cover
  • -Fake pins
  • -Bolt catch pin
  • -Steel takedown pins
  • -Assist knob