SACair Forum

I have heard horror stories of kwa's having terrible compression issues from having a non ported piston head. I have a kwa m4 on my soon to buy list and am wondering if this is a part in need of upgrading right away. If so will the ported piston raise my fps? My target fps is no more than 400.

They are actually one of the best "non-ported" piston heads I've seen in regard to performance. I haven't seen much a performance increase, if any, by replacing the piston head - even if you do you may not be within legal limits ie; 400+ fps... As most KWA m4's are close to that 400 mark. My only problem with them is that they are aluminum... I'd prefer plastic

Plastic non ported piston head...like marui :p

Im also looking to rig a mosfet and use an 11.1v lipo. any advice on what mosfet to get? Does aex sell mosfets and install them. also Im looking to stay away from deans, I dont want to convert my charger and all my batteries, all in all its just easier for me.

We do sell a simple but bulletproof mosfet.

I thought you didnt need a mosfet to run a lipo in a KWA. I mean they are always good idea though

The kwa's gears and internals are reinforced, however a mosfet will help reduce the wear (crap collecting on your trigger contacts), spikes from the motor, ect.

well i know that stuff haha, it just makes me raise the question on why they dont do a pre installed mosfet but I guess they are that confident that the gun can handle a lipo unprotected without a mosfet

They dont do it because it costs money and technically is unneeded.

I'm the proud owner of a KWA KM4 SR-10...