OTW Red Dot Sight: A Simple Definition

https://wiki-quicky.win/index.php?title=11_Ways_to_Completely_Revamp_Your_Gamo_Big_Cat_1250_Air_Rifle

A gun is a ranged weapon normally designed to pneumatically discharge projectiles[1] that happen to be sound (most guns) but may also be liquid (as in drinking water guns/cannons and projected drinking water disruptors)