Pollynator_bravo2
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Posts posted by Pollynator_bravo2
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No I believe they are amorak
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7 hours ago, Lozart said:
Sure about that? My A&K definitely does not have a V2 gearbox.
Yeah 100%. Got it off Defcon and I can see inside it’s a v2 also.
main difference to what I’ve worked with before is hop unit and nozzle length.
Since posting this I’ve looked about and it could be compression parts related namely piston and cylinder head 🤦♂️ I think I’ve got a couple spare bits I could use but it’s getting it sorted before Saturday -
So I can’t find to much on this particular system other than it’s much like the A&K versions. So this one runs a V2 gearbox.
out the box on 0.28g bbs without any work being done I was getting 211 fps. I’ve just popped new bucking and a m105 spring and I’m hitting 245fps and about 0.8j ish. I’ve stuck a ASG Infinity 45k motor in it which gave me an extra two ish RPS and now at 12.2rps.
I’m using a 7.4v lipo and the bucking is the orange 4uantum. I noticed that there is no port in the cylinder if that means anything however the inner barrel is pretty longI haven’t stripped the gb down to look at the compression parts but does anyone have any other experience with this system before I delve into deeper depths?
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On 16/02/2025 at 15:47, Tackle said:
Could they be slightly misaligned with the feed nozzle to the hop ?, not enough to stop them feeding but just enough to move the hop a fraction, causing a loss of air seal ?
How would I check that? There is very very little play when they are in so it must be a design fault I’m guessing
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Afternoon,
Ive been looking at my mates TM MP7 aeg. He brought a couple of new mags hi cap ones and they seem to reduce the performance of the gun to 100fps. The only modification he’s done to it is to adapt it from the odd tm battery adapter configuration which I think was a 7.2v battery over to a tamiya lipo 7.4v.
if it’s the mags I’m not sure I can solve that one.
anyone else had a similar issue? -
So tried changing bucking and it got worse, tried different barrel still bad. Checked compression on nozzle (should have done this before) and Maxx pro noz was leaking loads. Tried another max pro noz and same thing. Switched back to shs and hey presto it worked a treat. Now consistent fps at 270/280 and 0.9j-1j on 0.28g. Happy days and thanks for the help folks
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On 21/11/2024 at 21:58, Colin Allen said:
I would start by swapping out the hop unit or pairing it with a Maxx nozzle; the Maxx hop units are very picky and can be prone to power fluctuations if they are not happy.
Yeah it’s paired up with a Maxx nozzle as I had also read this so was a bit miffed when I ended up With problems tbh
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9 hours ago, ak2m4 said:
What's the cylinder type, and what's the spring if you happen to know?
Spring I think in m100. Cylinder I can’t remember the exact type but the port looks to be about two thirds down the cylinder
7 hours ago, The_Lord_Poncho said:With that much fps variation, potentially the bucking is folding at the lips? If you haven't already, maybe try a variety of different buckings, and ideally a different hop chamber at least to rule that out.
Ok cool I have a couple of stock buckings I can try. Maple leaf have given me the occasional issue in the past however this one looked to be positioned correctly compared to those that have given me grief
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FYI was testing with 0.28g bbs. I grabbed a hi cap mag to test but normally I run mid cap pts epm1 mags so not sure if it’s a feed issue?
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Evening all,
so I have put together a quick build with some bits I had in the garage. I brought a max pro hop as the spare I had was bust. It’s running a max 21.25mm nozzle, maple leaf bucking. Compression from cylinder was fantastic no leaks. Inside the gb is a 13:1 gear set with a ASG 18k motor. I had two inner barrels that I’ve tried a brass 280mm and a steel 240mm I think. I am getting on the brass a range between 160 -280 and on the steel it never got past 150. 🤦♂️
there is no delay chip on as there wasn’t in this gb before.
any ideas ? -
On 07/08/2024 at 21:16, Colin Allen said:
Cylinder head is generally 22mm OD, 1.5mm cross section.
Piston head is generally 24mm OD, 2.4mm cross section
AK2M4 sells some slightly larger piston head O rings for slightly larger cylinders; they are 24mm OD, 2.7mm cross section.Epic thanks for this. Next job on the list 😄
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On 06/08/2024 at 10:38, Lozart said:
Absolutely, other than being drier than a nuns fanny it seems to be in pretty good nick.
That was before being cleaned and lubed up. Was wetter than Gemma Collins mouth in greggs
On 06/08/2024 at 12:59, Colin Allen said:It is surprising how good some gearboxes look after a long period. I opened up the lad’s blowback G&G AKM on Sunday to deal with a low power issue, after it had not been opened for many years. Apart from a worn piston head O ring, it was pretty much perfect.
it was still a bugger to do due to the stupid pneumatic blowback system.
What’s the correct O ring size for the piston and cylinder head ?
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3 hours ago, Colin Allen said:
The nozzle is not fully engaging with the hop rubber lips. Is the hop unit pushed fully back against the gearbox? If it isn't, use some O rings in front of it to push it back. If it is, try longer nozzles or get a variable nozzle.
It’s a weird one as I grabbed the old gear box that came out of it and serviced it fully. When I opened it up the tappet plate looked different. It has a moon shape on the tail end and there is a delay chip however the nozzle is shorter than what I had in the eon gb. When I fitted it all back together (with a clean inner barrel and bucking) I got 335 fps and 1.28j (no hop applied) 🤦♂️🤷🏻♂️
I guess this is an easier problem to fix the the latter lol
images are of the gb that came with the gun when I brought it 2nd hand
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On 02/08/2024 at 09:38, Lozart said:
Timing does indeed mean the cycle of retracting the nozzle to allow the bb into the hop unit, then allowing it forward to seat the BB into the hop before the piston comes forward. If you're not getting a feeding issue that should be OK but if the nozzle isn't actually seating on the feed lips of the hop rubber properly you may be getting an air leak.
The chamfered tip of the nozzle should seal into the end of the hop rubber (the feed lip if you will). An easy test is to reassemble the gun, turn it upside down and place a small piece of paper over the feed tube. When you fire the gun the paper should move only minimally, if it blows off then there is air escaping down the feed tube.
Also - it may be the camera angle but your barrel doen't look straight in your hop unit - it may need twisting slightly to line it up.
So the paper moved a fair bit so I’m guessing air is escaping 🤦♂️
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6 hours ago, ak2m4 said:
@Pollynator_bravo2 clean that inner barrel and wash that rubber
Yeah fair point. Not done anything to it since I brought it off a seller. I think it was thrown together with bits from the Airsoft fair
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19 minutes ago, Lozart said:
Timing does indeed mean the cycle of retracting the nozzle to allow the bb into the hop unit, then allowing it forward to seat the BB into the hop before the piston comes forward. If you're not getting a feeding issue that should be OK but if the nozzle isn't actually seating on the feed lips of the hop rubber properly you may be getting an air leak.
The chamfered tip of the nozzle should seal into the end of the hop rubber (the feed lip if you will). An easy test is to reassemble the gun, turn it upside down and place a small piece of paper over the feed tube. When you fire the gun the paper should move only minimally, if it blows off then there is air escaping down the feed tube.
Also - it may be the camera angle but your barrel doen't look straight in your hop unit - it may need twisting slightly to line it up.
Awesome thanks I’ll try this.
if there is a leak does that mean I should fit a delay chip or slightly longer nozzle?
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14 hours ago, Skara said:
The SHS nozzles I bought a while ago were supposed to be 21.3 but they turned out to be 21.5 and change..
Length also depends on the hop unit, hop rubber and inner barrel, some combinations love short nozzles, others want longer.
For example the Maxx TE hop I have in my pdw says it wants 21.25mm tops but ran fine on the aforementioned 21.5mm shs nozzle for a while.
So the inner barrel is 360mm
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14 hours ago, Colin Allen said:
I have seen 21mm and 21.4mm. However, not all 21.4mm ones are the same length; there are marginal, but potentially significant, differences.
However, it could be a timing issue or one of many other issues which can occur when you bring different parts together.When you say timing do you mean when the nozzle moves forward and locates the bb into the feed lips before the piston sends the air down? Sorry if that’s a stupid question
also where should the nozzle
locate to when it enters the hop again?
I am not getting any miss feeding when the gun fires bbs fly so I think the retraction etc is ok
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3 hours ago, Colin Allen said:
Possibly a marginally different nozzle length, a different profile, or slightly too tight on the cylinder head tube.
Probably length as it’s the same I used previously with a health fps. Maybe too short? What other lengths are there for an m4 v2gb?
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16 minutes ago, Colin Allen said:
That should be ok for most M4 type barrel lengths. I use a similar one with a 360mm barrel.
Tbf I don’t think it’s over 400mm however I’ll check once I’m back home. Based on my poorly calibrated eyes I’m guessing between 350 to 370
in the past I’ve had similar platforms with nozzle related issues but I fitted an O ring to make sure the hop was as tight as poss to the gb/nozzle and the fps dropped 5 points 🤷🏻♂️
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So it’s a V2 gear box, Maple leaf 60 degree bucking, no delay chip, 13:1 gears, 18000 ASG motor, Rocket v2 tappet plate, SHS nozzle 21.4mm, Gate EON protector cylinder head, EON Power hybrid cylinder head.
Hop unit looks like a basic rotary unit but it was what come with the shell/receiver when I brought it second hand. The hop unit I used to run when fitted to the inner barrel, wouldn’t let the upper receiver fit all the way into the lower Reciever (this one has happened to me twice now so I’m wondering if some how I’ve made a school boy error when putting the upper back together)
I’ll get the measurements on the inner barrel and some more pictures later -
ASG HERA ARMS CQR AR-15 Milspec SSS Edition Hungry for electric
in Electric Guns
Posted
Hey folks. This is a new one on me. I brought one of these second hand admittedly and it went out to skirmish this weekend. It seemed to fire fine but when switching back to safe it was like the bbs dropped out and the power died. It’s got EBB on it and I was using a 7.4v lipo 2500mah. The behaviour was like the battery was dead.
Does anyone know anything about this model?