Sinden Lightgun Pump with Underrail
thingiverse
This is a direct replacement of the shotgun pump for the Sinden lightgun, with a Picatinny rail (based on the "[Picatinny rail for G36 airsoft gun](https://www.thingiverse.com/thing:4757)") augmented to the underside. This allows for accessories such as a foregrip to be attached below the barrel. The same screws holding the stock pump can be reused here. Two versions are included: The standard model is 32mm, adding the height of the rail to the original pump dimensions (approximately 28mm, not including the forward notch), and the short model is 28.5mm tall, roughly matching the height of the original pump. As the rail is being printed upside-down, supports are required. The photos are of the standard model. The second photo shows it being demonstrated with the "[Angled Foregrip (Worker)](https://www.thingiverse.com/thing:3533420)" found on this site.
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