How to Save Money on OTW Red Dot

https://wiki-wire.win/index.php?title=9_Things_Your_Parents_Taught_You_About_OTW_Red_Dot_Sight

A gun is usually a ranged weapon commonly designed to pneumatically discharge projectiles[1] which can be good (most guns) but can also be liquid (as in h2o guns/cannons and projected water disruptors) or perhaps