You kan make 1
No
No company makes a spring action galil airsoft gun currently.
You can't without some experience in metalwork.
Keep it clean and get a stronger spring.
go for the m14, unless its cheap looking.
No, it is a cheap spring gun and could not be used in an airsoft match
A spring gun? It depends on how fast you can cock the gun. There is not a fastest gun.
It really depends on the muzzle velocity (FPS), what the power source is (spring, gas, AEG), and what make/model the gun is.
yes
Never buy spring guns
No. The base of the guns are different and it is impossible to change it into a quality CO2.
No. even though some spring guns have great range, co2 allows you to fire more then once before reloading.