Still have not understood the purpose of the hop-up? Here is Burntwolf Airsoft to tell you more... "Right then you Horrible lot. This week on Burntwolf Airsoft im going to be having alook at BB ballistics!And the science behind Hop up and what exactly is going on when you pull the trigger of your favourite pew stick.

Was really surprised to find out that BB's actually generator there own lift in flight with the aid of the hop up unit,via the way the spinning projectile affects the air currents around it.

This effect is know as the Magnus Effect and has been know about for a while first noted by Sir Issac Newton and later by a German fellow Henrick Magnus who gave it its name.Its currently been used to create all kinds of flying machines and to cut down emissions in container ships travelling around the world."

Read more here.