The E-3 piston head o-ring fits all KWA AEGs, including the KM4, CQR, RM4, and VM4 Series rifles. It appears on gearbox diagrams as either part 123 or 384.
Fits these models
Diagram number: 123, 384. Match the number on your model’s exploded diagram in Part Finder & Diagram. Genuine KWA part, sold direct by KWA.
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