Guns Modify competition / fine-tuning hop-up adjustment wheel is designed as a high-quality upgrade part for more precise and stable hop-up adjustment.
Compatibility: Tokyo Marui M4A1 MWS GBBR
The adjustment wheel is designed for use with the following BB weights:
0.20 g
0.25 g
0.28 g
0.30 g
0.35 g
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