how to lower fps

[chris555]

Looking at the ghk akm as a secondry rifel how would you lower the fps on it nost guns seem to come out at 400 fps would need to be 340-350 fps to be useable

[david0512]

All I can think of is either use a less powerful gas or fit an NPAS (Negative Pressure Adjustment System) to it. Other than that, Maybe try a heavier bb?

[Qlimax]

You could use heavier BB's but Chrono testing is on. 20g bb regardless any Site allowing Chrono to be done on a heavier bb are idiots as heavier bb my reduce the Chrono speed but it will hit and hurt a lot more as your firing an overpowered gun with more weighted bbs in this it

 

You would have to use an NPAS

[Tariq]

Or use a less powerful gas.

144a might help