Airsoft hop-up adjuster
thingiverse
Airsoft adjuster fitting for 2.5mm hex/allen key style hopups. I got tired of having to dig the kex key out of my pocket and re-fit every time I wanted to adjust the hopup. This allows on-demand tweaking. This is basically a bearing that fits into the hopup channel. Its a perfect fit for the Well MB13 but can be modified to fit others with this style hopup.
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