Are their exceptions for FPS and would about 400 be ok?

350 or below

Is there rental guns?

All non-HPA replicas must chronograph at 350 fps or less with a .20 gram BB, and HPA replicas must chronograph at 330 fps or less.

Nothing over 350 ft per second

Nope, no way. 350 below.

Ya your fps is 350 or below

No the upper limit is 350fps