We know we milsimer are pursuit RS like gear, especially blaster on our both hand. Thanks to PTW's stock steel barrel give us more closer .However SYSTEMA's barrel is wrong design from RS M4 and quite heavy to carry.Therefore we have those for you, 6061-T6 CNC machined barrels for AR series. 

For the lover of milsim we also have the standard steel version with 1/2-28RH thread to let you use most of the RS spec muzzle brakes.
Still looking for THE BEST field barrel for PTW?

SYSTEMA M4 barrels

  • CNC lathed Alloy 6061-T6 barrel end with 14mmCCW
  • Steel made barrel locating pin