Description
FOR AIRSOFT USE ONLY!
ESD original parts.
Special specification valve knocker for AMBI Bolt Catch Model.
Compatible with VFC/Umarex HK416A5 Gen2 (V2) GBB series.
Compatible with VFC KAC SR-16E3 (M4 V2 system) GBB series.

● Product Brand : ESD (TAIWAN)
● Material : Steel

※ Requires DIY skills.
※ Cross-brand installation may involve slight tolerances or size differences — please adjust or grind as needed according to actual fitting.
※ Designed for installation on VFC/Umarex HK416A5 Gen2 /KAC SR-16E3 (M4 V2) GBB — converts split valve knocker parts into an integrated component.
※ For the latest VFC/Umarex HK416A5 Gen3 GBB series, it is recommended to use the original VFC V3 valve knocker parts to ensure optimal fit and performance.

Compatibility:
✓ Compatible with VFC/Umarex HK416A5 GBB (Gen2) series
✓ Compatible with VFC/Umarex VFC KAC SR-16 E3 (M4 V2 system) GBB series series
✗ NOT compatible with VFC M4 V2 GBB series
✗ NOT compatible with VFC/Umarex HK416D Gen2 (V2) GBB series