SVU spring query

[Mucknbullets]

Hi,

Newbie here who's just bought the ASP SVU from gun fire in Poland so it's running at about 400fps. My local site limit is 350 even if locked to semi. Guidance on what spring I would need to bring it down to the limit would be much appreciated. Gunfire think it has a 120 in it. 

Also have seen a couple of strip down videos but any suggestions on them too please.

And no I didn't see that gunfire will mod it to your spec before it was delivered.

Thanks

 

[Asomodai]

It depends how good the compression is on it stock not all SVUs are going to be the same. I would go for an M100 to be safe. 

Its an odd gun for full auto though as the rate of fire is very slow even with a faster motor etc because of the high torque gears which are fairly proprietary due to the 4th gear. 

 

[Mucknbullets]

It depends how good the compression is on it stock not all SVUs are going to be the same. I would go for an M100 to be safe. 

Its an odd gun for full auto though as the rate of fire is very slow even with a faster motor etc because of the high torque gears which are fairly proprietary due to the 4th gear. 

Click to shrink...

Thanks for that. It is indeed an of gun to fit the full auto option was you say. With local limit being 350 I'll leave it in for the moment but I know other sites will allow 400+ if locked so I've got that option too. 

Thanks again.

 

[kasaran]

Easy to lock. Just remove the gears outside the gearbox so the selector switch does nothing.  Beyond that i didnt change springs.  405fps on 0.2s for me