This replacement part is displayed as number 300 on KM4 series KM4A1/KM4CQB/KM4Commandor/KM4RIS/KM16BR diagrams and functions as the spring to push the delta ring forward and enable locking.
Fits these models
AEG2, KM4 CQB, KM4A1, LM4D RIS PTR
Diagram number: 300. Match the number on your model’s exploded diagram in Part Finder & Diagram. Genuine KWA part, sold direct by KWA.

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