PSG-1 decocking lever still functional after upgrades?

[HelloKitty]

The PSG-1, in stock form, requires that you push the decocking lever forward to decompress the spring after each use. I remember doing this while my PSG-1 was still stock and hearing the "whurring" sound of the spring being released.

I would assume that after upgrading it, you would still need to decock the AEG after each use so that the spring doesn't stay compressed. Interestingly enough, after my PSG-1 was upgraded with the Systema FTK, the decocking lever was very inconsistent. When I tried pushing it forward it would either A) have no resistance as though it was already decompressed? B) Have slight resistance and after pushing all the way past this resistance it would not have the "whurring" sound it used to have when it was still stock which leaves me wondering if it really got decompressed?

I'm not sure if this is normal behavior after installing Systema upgrades, could the Magnum motor and/or the Systema MOSFET have something to do with this?

[Dart]

the mosfet might have breaking turned on? Or the motor could be too stiff for the spring to "push"?

does it work with the battery out of the gun?

[HelloKitty]

The same issues occur with or without the battery. Yea I'm thinking you might be right that the Systema MOSFET might have included some sort of active braking, but what baffles me is that even if that's true why is the decocker inconsistent? Sometimes it has resistance sometimes it doesn't.

[Cobrajr122]

I have the FTK in my rifle with no problems, even with up to a 300% spring in it and a 12V batt.

I do not have a MOSFET in there though. Is your MOSFET made for the PSG-1 ONLY?
Is there some setting you have to go though to get it set up for the PSG1?
OR is it just a basic FET to keep heat off of the trigger contacts?

If its a more advanced FET, it could be getting confused by the way the PSG-1 works and not doing the proper full cycle(PSG-1's cycle is much longer then a normal AEG), that would explain the inconsistent pressure on the decocking lever.

Try taking the FET out and run the rifle without it for a few rounds and see if you get pressure on the lever, do this a few times just to make sure.

IF its not that, take the mechbox apart again and make sure nothing in the decocking system got messed up while the FTK was being put in.

[HelloKitty]

Cobrajr122, do you run the Systema Magnum as well? Does the decocker function just like it used to after all your Systema upgrades (do you hear that whurring sound still)? The MOSFET is the one that came with the Systema FTK so I would think it's for the PSG-1.

My new hypotheses are as follows do they make sense to you?
1. When the decocker has no resistance I'm assuming that means the spring is decompressed already.
2. When the decocker has some resistance and even after pushing past it, but not hearing the spring/motor do anything, I'm assuming something is preventing the spring from slamming forward i.e. it's still compressed.

What I've been doing so far is after shooting I'll check the decocker, if there's still resistance I'll keep firing a few rounds and re-check until I feel no resistance on that lever before storing. I'm doing this because it seems like the decocker isn't really doing its job.

[Cobrajr122]

Originally Posted by HelloKitty

My new hypotheses are as follows do they make sense to you?
1. When the decocker has no resistance I'm assuming that means the spring is decompressed already.
2. When the decocker has some resistance and even after pushing past it, but not hearing the spring/motor do anything, I'm assuming something is preventing the spring from slamming forward i.e. it's still compressed.

Those seem correct to me.

I don't remember if I have the Magnum in mine or not, I think it might be the stock TM or a stronger one. I do hear the whirring when I press on the lever.

[HelloKitty]

Cobrajr122, good to know that the whurring isn't just my imagination since I'm pretty sure I did hear whurring when decompressing my PSG-1 in the past in stock form. If your PSG-1 with some upgrades still has the whurring sound when decocking then I think my concern is legitimate i.e. that if I don't hear any whurring it's probably not decompressing. Someone on another forum thinks it might be the super strong neodymium magnets in the Systema magnum motor that isn't allowing the spring to relax.

From what I remember when my PSG-1 was still stock, after decompressing and hearing the whurring sound the decocking lever did not have any resistance any longer. So I'm deducing that no resistance on the lever = already decocked. Is my memory correct in that after you decock your PSG-1 the lever has no more resistance?

[Snipezilla]

my psg-1 does not "whrrrr" anymore either. I had the 300% systema full tune up kit in it for 5 years with a system super torque up motor. That motor the spring would decompress just fine, then the motor went out. The only thing I changed was the motor to the new magnum torque motor and no decompressing. I just take the motor out when it is time to store it for a long time, and I leave it compressed threw the season. springs are easy to find and easy to change. Hope this helps.

[sushicake]

You also have to remember that your PSG-1 only shoots semi, so each trigger pull is a full cycle of the gears thus resetting the spring. So you dont really need the spring release function, as all TM based guns dont have it, and work wonderfully without.

It will pull about 2-3mm of the spring, but that's just because the sector gear needs to pull the tappet plate back to load the next bb in.

Or it could just be your motor is stronger than the spring so when you do hit that decocking lever, the spring doesn't have enough strength to push against the motor.

[Amos]

Anyone should keep in mind that the PSG-1 works backwards from a regular AEG before giving advice on it.

Pressing the trigger releases the piston, then the motor spins up and re-cocks the piston after you take the shot.

[Kos-Mos]

Originally Posted by sushicake

You also have to remember that your PSG-1 only shoots semi, so each trigger pull is a full cycle of the gears thus resetting the spring. So you dont really need the spring release function, as all TM based guns dont have it, and work wonderfully without.

It will pull about 2-3mm of the spring, but that's just because the sector gear needs to pull the tappet plate back to load the next bb in.

Or it could just be your motor is stronger than the spring so when you do hit that decocking lever, the spring doesn't have enough strength to push against the motor.

Originally Posted by Amos

Anyone should keep in mind that the PSG-1 works backwards from a regular AEG before giving advice on it.

Pressing the trigger releases the piston, then the motor spins up and re-cocks the piston after you take the shot.

What he said... basically, when the gun finished a cycle, the piston is fully back, on the last teeth. That is the reason why the decocker is needed.

[Snipezilla]

I wouldn't say needed but it is important if you want to keep your spring in top shape. if you leave your spring in the loaded position to long it will lose some of it strength.

[Amos]

Thanks.

That was established in the OP's post.