what spring for under 350 fps

[Asomodai]

I have had an M95 chrono at 360 FPS before, it depends how good your air seal is. 

My P90 has an incredible seal and I had to use a M90 to drop it to 335 FPS. I generally use standard SHS ones. I am unsure about the differences myself beyond FPS variance. 

 

[paradoxum]

Well, I remember him saying the seal was great etc or something like that. I guess I need to buy an M90 because and M100 is gonne be over 350 if an M110 is 370.

How easy is it to replace the spring in my gun? since I'm buying my own chrono (ACETECH Airsoft Gun AC6000), and I'm waiting for Gate NANOAAB to be returned as the first one was DOA - rather than pay this guy to do it how easy is changing the spring and adding a mosfet?

I'm in the process of rebuilding the gun right now so this is what it looks like;

 

[Asomodai]

Well, I remember him saying the seal was great etc or something like that. I guess I need to buy an M90 because and M100 is gonne be over 350 if an M110 is 370.

How easy is it to replace the spring in my gun? since I'm buying my own chrono (ACETECH Airsoft Gun AC6000), and I'm waiting for Gate NANOAAB to be returned as the first one was DOA - rather than pay this guy to do it how easy is changing the spring and adding a mosfet?

I'm in the process of rebuilding the gun right now so this is what it looks like;

It uses a V6 gearbox. So although you will need to take the gearbox apart, it is one of the easiest gearboxes to work on as all of the wiring is external. 

Mosfet installation is a bit confusing on a V6 P90 which I have attempted before, but it is essentially the same as any other rifle. I am not a fan of the Gate NanoAAB as it would lock up my rifle fairly often if I spammed the trigger on semi. This happened on 3 of my rifs that had them installed. I switched them out for non AAB mosfets. Apparently the lock ups do not happen on other AAB mosfets but I couldn't confirm. 

 

[paradoxum]

I took it apart as far as separating the 'top' from the 'bottom of the main gun, but from there I had absolutely no idea how to access the spring or open it up. He put a new motor in for me and said to wire up a mosfet I'd need to access the gearbox anyway to wire up the signal wire. what do the other wires hook up to? cause if I can do some Y split on the cables now while I have it open and stick deans connectors on the end it would save time later (maybe?)

Also is that good for this gun? I got maple leaf bucking/nub, madbull barrel, and it's got a nuprol 16RPA motor in there. 

 

[paradoxum]

I've got these springs on hand now:

Springs
- Nuprol M110 AEG Spring
- Nuprol M100 AEG Spring
- SHS Nonlinear M90 AEG Spring
- VFC AEG Spring M90
- PDI AEG 100% (M90) Silicon Chrome Steel Spring Variable Pitch

I'm gonna get my own chrono shortly, (ACETECH Airsoft Gun AC6000, good choice?) and try each one. I'm interested to know why the PDI silicon chrome steel spring was so much more expensive than the rest.

Engineer said gun was firing 370 fps with 0.20g BBs using the M110 spring, the site limit here is 340, so I'm thinking I'll probably need to drop to M90 (I've seen M95's too). Having a hard time figuring out how to open the gearbox assembly though to change the spring and also install the mosfet wire.