Originally Posted by Killyin
I'm pretty new and I have a question about AEG springs and BB FPS.
Looking through the airsoft retailer sites in the Toronto area I find a selection of springs that advertise either an increase or decrease in FPS.
M110, M120, M130 etc.
I've got my eyes on a VFC M4ES that apparently shoots ~430 FPS out of the box which is totally not indoor usable from what I've read on the site. Can I install an M110 spring and have it shoot in the ~350 FPS range making it usable indoors as well as out?
M110 will give you about 380 fps +/-, but if you have a good hop up it can add another 15-20 fps. I recommend a 100 spring for about 350 fps, but then you still run the risk of more fps from your hop up. To be sure it will be good for indoors a M90 spring is your best bet.