The Echo 1 Modify Bore-Up Piston Head with Bearings is finely made with a revolutionary new design. It is constructed of aircraft aluminum alloy parts and high quality polcycarbonate to profile an effective, airtight seal. The Echo 1 series of upgrade parts are compatible with most major brands of AEG. You can expect the same level of quality from these parts as Guarder and Systema parts for a fraction of the price.  For all Marui style AEG's except PSG-1.

Includes the following features:

• Polycarbonate Construction with rubber bumper and thrust bearing.
• Has Stainless Screw nut inside
• It's compatible with all Modify and Systema series Bore-Up Cylinders.
• Best results if used with M120 strenght spring or higher.

Part No. GU-02-01