Tech Advice Needed - Overspin and Inconsistent, Low FPS

[Ragingrental]

I looked at their store and I was a bit bummed out that they had only metal nozzles despite them being the appropriate size.

 

[Adolf Hamster]

I looked at their store and I was a bit bummed out that they had only metal nozzles despite them being the appropriate size.

nowt wrong with a metal nozzle?

 

[Ragingrental]

Well I am still relatively new to this whole  AEG teching thing and I heard a few posts up that a metal nozzle if not aligned correctly can shred your bucking? I'd rather not take  the risk yet on something I haven't looked into much.

 

[Adolf Hamster]

Well I am still relatively new to this whole  AEG teching thing and I heard a few posts up that a metal nozzle if not aligned correctly can shred your bucking? I'd rather not take  the risk yet on something I haven't looked into much.

that's a new one to me, been using alu/brass nozzles for years never had a bucking shred that wasn't the result of some hair-brained tinkering i was doing.

not that there's anything wrong with polymer nozzles (outside of high fps applications) either.

 

[Ragingrental]

Alright so I guess I'll be ordering a new piston O-ring and  nozzle off AK2M4 now. So I now have two buckings to play around with on the way as well as new O rings for my piston head and a new nozzle. Fingers crossed it works.

 

[Adolf Hamster]

Alright so I guess I'll be ordering a new piston O-ring and  nozzle off AK2M4 now.

make sure to get the length right, whilst you can cut/file down a nozzle to the right length unless you're using a decent lathe to do it you'll almost always end up with sealing issues (which defeats the purpose of the better nozzle)

 

[Ragingrental]

How would I check if I am getting PME once I install a longer spring and SS a tooth or two? Is there a guide for that on this forum already?

Hopefully the gun will work just fine now although I might as well pick up a gate warfet some time in the near-ish future as it seems to be quite heavily recommended. But if I end up with a skirmishable gun that doesn't  have any PME issues and is consistent and can hop heavy BB's I'll be very happy. Still going to always bring my back up with a few spare mags just in case haha.

 

[Lozart]

isn't that just the thing with the specna's though, they started off pretty damn good then went downhill?

Yes....and also, no.

The One Series never stopped being good but the original Edge and Core series guns with the Orion gearbox were gash. People bitched about them but unlike most other manufacturers they listened and sorted their shit out. The Orion box still has some issues but they're nowhere near as bad as they once were. Of course in airsoft (even more so than normal life it seems), shit sticks so "all Specnas are shit".

 

[Adolf Hamster]

How would I check if I am getting PME once I install a longer spring and SS a tooth or two? Is there a guide for that on this forum already?

if it's happening badly then it tends to be pretty obvious with a drop in fps in auto (right before the even more obvious symptom where the piston spits its teeth all over the inside of the box)

in the lighter cases it can be kinda hard to diagnose, tbh on 20rps at 1j i wouldn't have said you'd be getting it even with a full stroke cylinder.

 

[Skara]

all Specnas are shit

I never said that.

On the contrary, I highly praise them for being good guns at affordable prices.

It's just that, as with all things, when you lower the price you need to cut corners somewhere and the compression is what Specna chose for their Core/Edge series.

Regarding PME, imagine your gun suddenly turning into a typewriter.

 

[Lozart]

I never said that.

I never said that you did. I was referring to the "general consensus" of the great airsoft unwashed that believes every word they see on social media.

 

[Ragingrental]

if it's happening badly then it tends to be pretty obvious with a drop in fps in auto (right before the even more obvious symptom where the piston spits its teeth all over the inside of the box)

in the lighter cases it can be kinda hard to diagnose, tbh on 20rps at 1j i wouldn't have said you'd be getting it even with a full stroke cylinder.

I guess I might as well  install a stronger spin to be safe. I'll chrono it on auto once I get the new spring, bucking and nozzle and see what it's like.

 

[Adolf Hamster]

I guess I might as well  install a stronger spin to be safe. I'll chrono it on auto once I get the new spring, bucking and nozzle and see what it's like.

if you get the air seal issues sorted out (a nice low shot-shot variation on the chrono) then a stronger spring wouldn't be a bad shout if you've got a bit of headroom before hitting the site limit.

you'll also need to do that if you're short-stroking.

 

[Ragingrental]

Alright so assuming these parts fit the gun and that I don't get any more issues, I should finally have a gun that can hop heavier BB's and that  has quite snappy trigger response with no PME (at least that's what I gathered from this thread) and  less overspin. Seems pretty decent I guess haha. Got to play the waiting game now.

I'll probably install everything and chrono it on full auto before SS'ing to see if the  PME is still there. Then if I still end up with issues I can obviously short stroke a tooth or two and see how it is.

 

[Ragingrental]

Uhhh... The PDI W hold also has feeding issues. going to need to wait for the G&G green to show up.

 

[Skara]

How much does it protrude into the hop chamber?

(to check this, turn the gun upside down and look into the hop up feed tube, help yourself by shining a torch down the muzzle)

While you're at it, plug the battery and fire a couple of dry shots, does the nozzle retreat all the way? if you were to drop a bb into the hop chamber -after making sure you're not pointing at your cat or some expensive stuff- and press the trigger, does the nozzle load it into the hop?

Oddly enough, I only had bad experiences with G&G greens. Bad air seal, couldn't lift 0.25s, bad consistency (bbs were flying left and right, everywhere but where I was aiming at).

 

[Ragingrental]

The nozzle retreats all the way  and it loads the BB into the hop as well. No issues with that at all. The lips protrude maybe 1.5mm at most into the hop chamber.

 

[Adolf Hamster]

The nozzle retreats all the way  and it loads the BB into the hop as well. No issues with that at all. The lips protrude maybe 1.5mm at most into the hop chamber.

1.5mm is too much, but i dont think a g&g is gonna be any shorter?

 

[Ragingrental]

Could I trim the lips? Say with small scissors or a razor blade?

 

[Skara]

It's better done very carefully with the finest sandpaper you can find.