Whats a QD mechbox. Im sorta new to airsoft and the techy termsIf it has a QD mechbox. Drop in a "Good" M100(330)/150%(340)/SP90(330) spring.
Quick Detach - Where the spring guide comes off the back mechbox without doing a major tear down to allow you to change the spring (after you set the piston forward by firing in SA mode).
The Alpha (discontinued) CRB does have this feature...
Scroll down onto the mechbox section to see this feature.
So what kind of spring do you suggest? M100? M120?Directly a spring does not burn out a motor. Plus the increase is minimal, going from a 300FPS spring to a 350FPS spring.
High voltage batteries and a really heavy spring affect motor life more drastically, but it doesn't technically "burn it out" in a short period of time and use.