*EXCLUSIVE* CTW-PTW M4-M16 Series 440fps Advanced Cylinder Unit.

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Description: *EXCLUSIVE* CTW/PTW M4/M16 Series 440fps Advanced Cylinder Unit.

This CTW power upgraded cylinder unit is ONLY available here at HSA! These are custom build and tested here "In the House" by our Certified PTW Technician.
Quantities are limited so GET Yours NOW!


  • Material: Aluminum
  • Length 65mm
  • Outer Diameter 25.45mm
  • Net Weight: 154.6g
  • 430-440 F.P.S.
  • Compatible with CTW and PTW M4, M4 CQB, M16A2, M16A3 Training Weapon