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Discussion Starter · #1 ·
Hey guys I need some help, I just got my CA M24 back from a friend (been lending it to him) and he told me he couldn't get the hop-up chamber out to adjust it. It's been a while since I last used / touched an M24 internals so I was wondering if you could help me.

The barrel + PDI chamber won't slide out

I remember there being a hex screw that held it in place but it seems to have disappeared:



and for the life of me I can't remember what these two hex screws did.
(red oval)



It's really embarassing that I can't figure this out because I put it together but it has been around 1 1/2 years since I last handled it.

Anyone got any helpful input for me?
 

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Discussion Starter · #5 ·
Yup and it will not budge a mm. Slightly concerned now as there was no hex screw originally in the top picture's hole which is the main component that holds in the hop-up. Is the PDI chamber supposed to be a tight-fit in the first place? Would explain atleast a little bit of the problem.
 

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The problem is not have the screw. The cheap pot metal CA used suck, and the force of a high velocity set up caused the screw to shake out. The impact of the piston hitting has pushed it too far forward. It's going to be hard as hell to get out man. I've used an old inner barrel in the past and fed it into the hop up from the front. You basically need to beat it out. You'll need to completely back out the adjustment screw, and you're probably going to tear your bucking, but it's about the only way to get it to budge at this point.
 

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Peyote said:
I'll see what I can do. Pretty upset since this set-up cost me just over $1000 and now this... Oh well...
I know how it is. I have 2 $1,000+ M24s, both have done the same thing. Once you get it out, you can retap the hole and use a bit bigger hex screw. That's about all you can do aside from getting a new receiver/barrel assembly.
 

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Peyote said:
I think the worst part is that I myself never shot the thing, I spent the cash building it and was never able to get a CA M24 mag so I just lent it to a friend to use.
If the only reason you need to get it out is to set the hop up, all you have to do is drop the mag and cycle the cylinder back so you have access to the hex screws. It'll work the same with where it's at. The problem comes when you need to replace the bucking. You should still be able to clean the barrel with it inside the outer still.
 
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