Tony is 100% right .......plastic gears and 'Heng Long' grade plastic = broken !.....Metal gears from a decent airsoft gun is definitely the way to go if you want REAL power
........I have a pretty cheap AK 47 plastic replica and its firing power makes the 'standard gun' look pathetic ..... Even in England and its crazy ' anti-gun laws' the power limit of a BB gun is WAY over and above a standard 'BB' tank gun .....
... and the claimed 25 metre range of the guns is very much a joke....

Alb.