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
It really depends on the muzzle velocity (FPS), what the power source is (spring, gas, AEG), and what make/model the gun is.
A spring gun? It depends on how fast you can cock the gun. There is not a fastest gun.
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.