Airgun Blog: 10 Things I Wish I'd Known Earlier
https://rapid-wiki.win/index.php?title=OTW_Red_Dot_Sight_Explained_in_Fewer_than_140_Characters
A gun is usually a ranged weapon generally intended to pneumatically discharge projectiles[one] that happen to be solid (most guns) but can be liquid (as in water guns/cannons and projected h2o disruptors) or maybe