G&G M4 Blowback
I am looking at buying the G&G M4 Carbine with blowback from BuyAirsoft.ca. I know that fps doesnt reflect the quality of the gun but I am concerned that the fps of the gun (320fps) is too low. Should I upgrade it with a new spring? Also, because of the blowback feature, would it be harder to find internals for it?