Originally Posted by Apoc_ (Post 690242)

On a side note regarding voltage and PSG-1: With the 200% spring and a 10.8v custom battery, my PSG-1 would fire two round bursts. The innards were spinning so fast, the piston would fail to catch at the end of the cycle and fire a 2nd time. Next trigger pull would result in just cranking the piston back to firing position. So, 1st trigger pull = 1.5 cycles, 2nd pull = .5 cycle. It was fun, but we decided to remove the extra cells and now all is well with 8.4v. Just something to be aware of if you go with a custom battery.

Originally Posted by ILLusion (Post 690241)

I'll take a wild stab in the dark and say velocity will be 650fps.

Even with the 300% spring, I was powering it with a 12V and Systema Magnum motor. I'm sure the same setup can crank a 400% spring, but you'll definitely have some serious durability issues in the long run.

If you want velocities so high, why not just pick up a Tanaka M700 series bolt action rifle and install the G&G Power bolt? You'll easily hit 800fps with propane, and it'll save you tons of money and headaches.... it will also perform much better. Bolt actions are inherently more accurate and quieter. The only feature you lose is the semi-auto fire.

As a field gun, the PSG-1 is one of the worst guns to do up, due to the wobbly body and the inherent limitations of applying high velocity upgrades to the auto-electric system. I always tell this to all my clients who request to do the upgrade: Unless you REALLY LOVE the PSG-1, it's a lot of wasted money to achieve a goal that you can get elsewhere for better and cheaper. There's a certain coolness factor versus cost benefit ratio that needs to be weighed on the owner's mind.

As cool as I think the PSG-1 system is, I can't honestly see myself ever using that gun as a field gun.

Originally Posted by ILLusion (Post 690173)

We're talking about PSG-1's here. Not standard AEGs.

The function is opposite, where the piston stays cocked in the off cycle. It allows for instantaneous shots on trigger pull. The wind up cycle occurs after the piston is released.

This is why PSG-1 upgrades require so much torque - being able to crank an already cocked spring from a resting position requires way more current and torque than normal functioning AEGs do.

Originally Posted by Apoc_ (Post 690399)

The gears that came in the FTK. and yep, that's exactly what was happening.

Originally Posted by DSFD506 (Post 690403)

I actually love the PSG1 and thus the reason I bought this long ago. I've already upgraded the gears, air nozzle, 180% spring and the old Systema torque up motor for 402fps. I'd just like a little more out of it. I'm not looking for crazy fps just something around the 500 to 550 level. As far as the battery goes, I hooked up my 10.8v from my M4 to it and sometimes it had trouble compressing the spring. My 9.6v will not compress the spring at all.

Originally Posted by ILLusion (Post 690759)

If you're going to push the velocity up that high, I highly recommend you installing a MOSFET. If you don't, you're going to burn holes in to your switch assembly due to the huge electrical arcing that occurs with current draw that large.
Once you burn out your switch contacts... good luck getting a replacement. :P