Ill try too make a video this weekend.

Mine does 100% the same as Bahhwa.



Renegade), The Gearbox is 100% back together and tight.

Stealth, I have 100% free movement of the nozzle when first assembled, As soon as I pull the trigger, The nozzle gets stuck in the back position.
If I try Auto, After a few pulls, The nozzle will free up and move as normal, until I pull the trigger again.

I think the sector gear is still engaged on the piston causing this. Ill redo my AOE. 1:00 is not working on this gear box.

so you fire a shot in semi. the nozzle gets locked back.
if you just tap the trigger light enough to move the gears around a bit, can you pull the nozzle out by hand and gage the resistance?
Also, whatever the nozzle/tappet plate does when the sector gear catches it, is exactly what it does when you move it back and forth by hand to make sure it's free. So if the sector gears makes it catch on something on the way back, you should be able to replicate that just by pushing the nozzle back

Isn't it pretty normal for the nozzle to stop in the rear position when firing in semi

If the nozzle feels "stuck" when it's in the rear position that's because the tappet plate is already up against the cylinder head and the sector gear has pulled the tappet plate back. It's not actually "stuck".

That's the first thing I thought too, I just assumed he knows that and the nozzles actually getting caught up on something lol

Ok You guys are on the money, I think :)
It semi, The nozzle Stops in the Back position, And is not able too move forward by hand. Is this the proper function?

As for it getting stuck in the back position, I assumed this was not correct due too my 60 FPS loss after all my upgrades.

Ive double and triple check compression on the cylinder all the way too the nozzle. Im not able too push the piston with my finger blocking the nozzle, in Easy at all.

So if all else is normal, My last possible issues could be. The nozzle does not fit right?
OR The Nozzle isn't meeting the hop-up properly?

I guess Ill take it apart and check this issues too.
Please keep the help coming.

Try with hop up on a lower setting.
M120 should net you 440-450 FPS if you have a good air seal, not 310. Only one of my guns runs a M120 and it shoots 455 FPS.

I've also seen serious fps drops if the hop is all the way off, a BB gets loaded and the force of the air nozzle moves it PAST the hopup, and results in extremely low fps.

After rebuilding the full system again Im back too normal.
Im at 385FPS On the stock spring. My Old G@G motor just cant pull the M120.
Even at 385FPS, My RPS is a low 10.5.
This is a M4 DMR, So Auto fire is unlikely.

If I added a New motor and M120 Spring, This gun would be un-field able I think.

As for the problem, PURE Noob shit. I had the Main spring backward, And my AOE was out a bit.

:banghead::banghead::banghead:

Learning as im going :)

nice.
What about a tienly or lonex motor?
Also what kind of battery are you using?

Im thinking a lonex Just because I like too Order From AirsoftStore Canada

And the Batt is a 9.6 1600.

Not sure how much more I want too dump into this gun, Its not even my main LOL.

Still Very fun too build and learn.

I have $1000 invested in a gun I haven't gamed in a year and a half lol

Glad it works now, but neither of those would contribute to a real fps drop

having a non-linear spring backwards has been known to make anywhere from 30-60fps drops
Don't ask me to explain it, I don't understand the science

I've heard that too, but I've never noticed a difference. Back in my noob days I installed a M100 backwards and still got 405 FPS out of it. Doesn't make logical sense to me.