KJW G23 GBB problems - please help!

Nick Carroll

First off - I'm a total newb and would really appreciate any help you can give.

I have just purchased a KJ Works G23 Gas blowback and am having some serious issues with it. It seems to be spitting out a bunch of gas by the time I get onto the third mag or so. It's like the gas release button is staying pushed in. As you'd expect, when it starts doing this it's impossible to use the gun. If you try to gas it with the mag attached gas just goes straight through and out the barrel!

The gas I was given when I got the gun is Abbey Predator Gun Gas 134a, and the guy in the shop said it was pretty poor quality, but it was all he had left.

To my untrained eye, it looks like water vapour in the gas is being gradually frozen by the propane and icing up the gas release mechanism. The back plate under the rear site goes totally white with ice. This diagnosis could be completely off the mark, but I'm a newbie and it's my best guess looking at the gun.

I'm just hoping it's not a faulty gun. It would be a complete bummer if my first airsoft was a dud!

o1s1n

Nick Carroll wrote:

First off - I'm a total newb and would really appreciate any help you can give.

I have just purchased a KJ Works G23 Gas blowback and am having some serious issues with it. It seems to be spitting out a bunch of gas by the time I get onto the third mag or so. It's like the gas release button is staying pushed in. As you'd expect, when it starts doing this it's impossible to use the gun. If you try to gas it with the mag attached gas just goes straight through and out the barrel!

The gas I was given when I got the gun is Abbey Predator Gun Gas 134a, and the guy in the shop said it was pretty poor quality, but it was all he had left.

To my untrained eye, it looks like water vapour in the gas is being gradually frozen by the propane and icing up the gas release mechanism. The back plate under the rear site goes totally white with ice. This diagnosis could be completely off the mark, but I'm a newbie and it's my best guess looking at the gun.

I'm just hoping it's not a faulty gun. It would be a complete bummer if my first airsoft was a dud!

Are you just using the one magazine over and over? Mags get to a point where they're too cold and wont work. You have to leave them to heat up again. Try putting it on a radiator. Good reason for having more than one magazine.

ED E

I have a KJW m9 and generally i use a mag once(only have 2) then refill the bbs and gas if possible. You can get two mags out of one charge, but three, nah. Try kepping the ROF down and give the gun breaks to warm up or the chamber can also freeze. What can happen is at the end of a mag the pressure is small so it sends the slide half way then emties all the vapur into the chamber and vents it all out the barrel as the chamber freezes.

This is just my experience:p

kdouglas

Nick Carroll wrote:

First off - I'm a total newb and would really appreciate any help you can give.

I have just purchased a KJ Works G23 Gas blowback and am having some serious issues with it. It seems to be spitting out a bunch of gas by the time I get onto the third mag or so. It's like the gas release button is staying pushed in. As you'd expect, when it starts doing this it's impossible to use the gun. If you try to gas it with the mag attached gas just goes straight through and out the barrel!

normally you'd expect to get two mags worth of bbs out of a gas fill, so as Lethal suggested, its probably just low on gas at this stage and venting whatever is left over

i've tried filling my m9 with the mag in the gun before, gas just goes straight through

if you notice the release valve is quite loose when there is no gas in the mag, hence when you put it in the gun the striker is against the release valve and locks it open, but if you fill the gas first the release valve is locked closed and the striker doesnt have enough pressure behind it to open the valve until you pull the trigger and the the hammer/striker is pulled back and then comes forward with enough pressure to open the release valve for a second...

Nick Carroll wrote:

The gas I was given when I got the gun is Abbey Predator Gun Gas 134a, and the guy in the shop said it was pretty poor quality, but it was all he had left.

To my untrained eye, it looks like water vapour in the gas is being gradually frozen by the propane and icing up the gas release mechanism. The back plate under the rear site goes totally white with ice. This diagnosis could be completely off the mark, but I'm a newbie and it's my best guess looking at the gun.

not sure what abbey gas is like, use propane myself...

the gas natural ices up when it's released, especially when you release it quickly (i.e. rapid fire) cant remember what its called, but its on of those silly laws of physics

when the mag is emptying out on you at the end, ice can form quite easily

Nick Carroll wrote:

I'm just hoping it's not a faulty gun. It would be a complete bummer if my first airsoft was a dud!

doesnt seem like it, just be sure to fill the gas every two mags worth of bbs and you should be fine, if the gas does start to vent, pull the slide back and it should stop, try not to stick your hand into the gas though, itll give you an ice burn

o1s1n

I have a feeling when he said "third mag" he actually means third fill with gas, rather than third mag from one gas charge.

If this is the case it's the magazine having a cool down effect. Happens to mine. On the third gas charge the gas just goes straight through. I have to leave it for a while to let it warm up.

ED E

I have(well, had, almost gone!) abbey predator gas. Great at the start but then the pressure in the tank reduced very quickly. I much prefer propane. KD is right, dont fill mags while there in the gun and remember, turn em upside down before filling.

kdouglas

good point, either way, there's a solution in one of our posts

o1s1n

*high five*

gandalf

Had a similar problem with my KJW P226 at the weekend and it was where the gas was running low or when I fired a few mags in quick succession test firing. Was using that Abbey gas and it seems fine.

Nick Carroll

o1s1n wrote:

Are you just using the one magazine over and over? Mags get to a point where they're too cold and wont work. You have to leave them to heat up again. Try putting it on a radiator. Good reason for having more than one magazine.

Yeah, just the one mag - he was out of those too! I'm going up to a shop in Ballymena next week, so hopefully I'll pick up a few there.

Lethal_Bullet wrote:

I have a KJW m9 and generally i use a mag once(only have 2) then refill the bbs and gas if possible. You can get two mags out of one charge, but three, nah. Try kepping the ROF down and give the gun breaks to warm up or the chamber can also freeze. What can happen is at the end of a mag the pressure is small so it sends the slide half way then emties all the vapur into the chamber and vents it all out the barrel as the chamber freezes.

Okay, that makes a lot of sense. I'm eager to get as much shooting time in as possible because I'm just starting - maybe too eager! Here's me blaming it on cheap gas!! Thanks to you all for your help.

o1s1n

gandalf wrote:

Had a similar problem with my KJW P226 at the weekend and it was where the gas was running low or when I fired a few mags in quick succession test firing. Was using that Abbey gas and it seems fine.

Where'd you get that Abbey gas? Someone give it to you at HRTA? I'm still trying to sort out an order for two with Vipershop. Said they should be sending my invoice out tomorrow. I hope so. Going mental not being able to test this new pistol.

ED E

Got mine from Airsoft Scotland(Took 2 weeks!)

gandalf

Got it from Firesupport in 2 days along with Silicon Spray Oil, Maintenance Spray and a few other bits and pieces.

Harekin

Also one thing to point out, if its KJ Works then theres a good chance theres alot of metal on it. My full metal M92f doesnt perform well when on uber-cooldown mode cos it takes more gas to work...dunno if thats relevant to you!

I looked inside it today to see how the trigger system worked with the gas valve. If the gun only half cocks (due to cooldown or low gas) the gas release "pin" stays locked and will vent all your remaining gas. Id imagine this is your problem.

ED E

Think thats what happens to me harekin, generally the slide isnt going the full way before it dumps the gas.

Harekin

Its because of the position of the gas release pin when its half cocked, its in the position it is when you pull the trigger (thus retracting the slide for the blow-back)but it can stay in the firing position if the slide doesnt fully retract and cock the hammer.

legionaire

Do not re-gas your mag whilst inside pistol.
My magazine also had a sealing problem at the bottom valve, just replaced o'ring.
Does anybody know where can i buy extra mags for this replica???

Masada

lol

the cobwebbs on this thread!

Stercus Accidit

Masada wrote: »

lol

the cobwebbs on this thread!

No flies on this lad.

legionaire

Masada wrote: »

lol

the cobwebbs on this thread!

No matter how old the thread, always a good database.
The good thing is, this thread made me discover this board.
And, funny thing, I left a question hanging on the cobweb and nobody answered, but thanks anyway!
Slainte.

zero19

I'm sure a quick search on google would have yielded a quicker answer for that type of question than here, try the various online stores in hong kong (wgc, uncompany etc..) they are your best hope for finding magazines

legionaire

zero19 wrote: »

I'm sure a quick search on google would have yielded a quicker answer for that type of question than here, try the various online stores in hong kong (wgc, uncompany etc..) they are your best hope for finding magazines

Thank you zero19, but I prefer Europe.
I posted a new thread on this board, and another user referred Eirsoft.
Already bought one, thanks for the help.
Slainte