HAO's Cylinder spring are made by SWP-B Spring(Cold-drawn Steel Wire for Mechanical Spring).

Main Cylinder Spring M90/110/130/150


Term Of Use:
All the products are made and design for Airsoft use. Any modification of structure, exterior, appearance or painting, marking or wiping the cover/instruction on the merchandise may lead to violate your nation's law regulation. Customers shall bear the full legal liability after the modification.