i have a G&P Metal M4 Rapid Fire II. i want to upgrade my spring to the Systema M130 Irregular-Pitch. can i will do it?

my airsoft aeg is
G&P Metal M4 Rapid Fire II Assault Rifle AEG
the full name off the spring is
Systema M130 Irregular-Pitch Airsoft AEG Power-Up Spring (420~450 FPS)

and if i can. do i need to upgrade more stuff in the gun?

TylerF161 year ago

yes upgrapde the motor you will need a higher torque motor for a heavyer spring