Recently, I've done an upgrade myself. Actually, 2 hours ago.
I had a skilled friend of mine do the upgrade for me, after the many he's done for himself and others.
I decided 290 fps (used the spring and was unsatisfied) wasn't enough on my Classic Army M15a4 carbine.
So I threw in the following parts:
Systema Area 1000:
M120 Spring
Polycarbonate Piston
Polycarbonate Piston Head
Aluminum Cylinder head
-End-
Now, I put it all together with some "minor" issues such as the Anti-reversal latch popping out, trigger popping out, and what not. Simple fixes.
I know for a FACT, the High-torque Classic Army motor + 9.6 2000mAh battery is well enough to pull an M120 and more.
After all is said and done, i plug the (full charged) battery in, put in Semi, nothing.
Put in auto, nothing.. Nothing but a click and heat near the battery connection to gun plug.
!?! WTHELL
