this is a continuation for my review of the Unicorn AKS-74U. I bought this AEG to create a PTW for CQB.
First the overhaul: cyma internals with a 6.04 TBB OOB @ ~340FPS (all stock)
short stroke the piston three teeth and clip the 2nd to last tooth
swiss cheese the piston (~.50% of the weight)
short stroke the gears three teeth (equals high speed gear ratio)
SystemA duracon piston head w/o bearing
SystemA v.3 spring guide with bearing
polish the MB piston and tappet rails
New bushings and reshim the gears
KA sector chip
The great thing about short stroking is that you can use stock TM gears and turn them into high speed gears. Then you have cheap HSGs and they are durable.
I should be at ~310FPS and well over 18rps
Either way a mosfet will increase ROF by 20-30%
At 18rps my ROF after the installation of the MOSFET will be at least 24rps.
If that doesn't do it I'll throw a 9.6v 1500mah (4/5A cell) NiCd in it.
The PTW features include:
MOSFET
3 shot burst
cocking required (before firing a new midcap)
anti-dry fire
active breaking (gears wont over spin in semi)
complete piston cycles (100% piston cycles)
low resistance resettable fuse
If I'm correct, this is more than what a SystemA PTW can do.
HOW? And I wish I could take credit for this, but I cant.
This is all possible because PsyphyerVII has awesome MOSFETs. He sells, what he calls, REALISM MOSFETs for M4/M16 and AKs for $90-100USD. Give him a shout if you are interested. He is really busy so don't get offended or discouraged if he doesn't respond soon. Give him a week and send him a quick note. I already have one of his FETs in my SAW and its great. He has others to if you don't want the REALISM MOSFET.
http://forums.airsoftmechanics.com/i...hp?topic=439.0
If i have time this weekend I'll crack it open and start hacking on my internals. The FET will have to wait though. I don't have $100 laying around at the moment.
mateba