Problem with a KJW M9 Elite IA gas guzzling

[Kuro_Neko]

So as I imagine you've gathered from the title I'm having trouble with my KJW M9 Elite IA. Suddenly I'm only getting about a quarter of the number of rounds out of a mag of gas as I used to. And it's not the mag cause I have three and it's happening to all three.

Normally I can get two to two and a half full twenty-five round mags of ammo on one mag's worth of gas. Now I'm getting about fifteen to twenty rounds. If I fire really slowly I can almost get a full mag's worth. I completely stripped the gun and I can't see anything obviously wrong with it but I'm by no means anything even close to a gun doc.

If anyone could shed some light on this problem for me I would appreciate it very much.

Thanks,
Kuro_Neko

[ancorp]

Had the same problem with my KJW m9, turned out that the inner shell that holds the hammer mechanism was cracked. Replaced it and everything is back to normal. Check your blowback chamber and piston too.

Good luck.
Alex

[Kuro_Neko]

I'm pretty clueless when it comes to this sort of thing. Could you tell me what number parts you're referring to on this Beretta M92 Exploded diagram? I'll strip the thing again and check the parts in question over carefully. Thanks for the quick response by the way.

Kuro_Neko

[ancorp]

The bottom rear of 92B-33 cracked off on mine.

[incrediboy729]

Well if you still can't see anything wrong on the gun maybe it's because the weather is getting cold?
For me, fifteen to twenty rounds in winter isn't that bad.

[Skladfin]

You're propane tank may not be full and doesn't have enough gas pressure to fill the whole mag.

[Kuro_Neko]

Ancorp, are you sure you mean 92B-33? Cause that's one of the lower slide rails.

incrediboy, those test firings were done in my apartment which is a toasty 22C.

Skladfin, I hadn't thought of that. Hmm... it's still early enough, I'll spin out and buy another tank of propane to test that theory. They're only four'ish dollars so even if that's not the case I haven't lost anything. It'd get used eventually anyway.

Thanks for the prompt replies guys.

Kuro_Neko

[Kuro_Neko]

Ok, almost empty propane tank seems to have been that problem. But now I have two more. The first and most serious is every time I pull the trigger the mag falls out. I've taken a look at the mag release button and it's spring, it looks ok. The second is at least once a mag part 92b-12 gets hung up on the edge of part 92b-3.

Thanks again for the help.

Kuro_Neko

[Crunchmeister]

Originally Posted by Kuro_Neko

The first and most serious is every time I pull the trigger the mag falls out. I've taken a look at the mag release button and it's spring, it looks ok.

I can tell you what this is - your mag catch is worn. I have the same issue with my KJ M9. It's plastic, so only takes so much of a beating.

What I did as a temporary fix until I get a new part is to reverse the mag catch. Remove the grip plates, and the catch should come out easily. You'll notice that the edge will more than likely be a little rounded. Reinsert it from the other side of the gun (it's made to be ambidextrous for left handed shooters).

I believe TM parts will fit it with minor modification.

[Kuro_Neko]

Thank you Crunchmeister! That actually solved both problems. The edge of the catch was very rounded just like you said. And the gun is even kicking harder, I guess the sharp edge of the other side of the catch is alittle higher and thus is making a better seal. I can even use that KJW M92f mag I bought awhile back. It sat just lose enough in the well before that I was losing enough gas to not get through even half a mag. Now I can just barely get through one. Which is fine since I usually realcap my mags anyway.

I am actually a lefty, I wasn't aware it could be reversed so this is even better. Is there any way to get a metal mag catch though? I actually wondered that long before I had any problems with it. I just didn't like that on a full metal gun they'd put a plastic mag catch. But a metal catch would solve this problem permanently.

While I'm in here and asking questions, I have one more. When I was repairing a leak in one of my mags I saw something up in the gas well, looked kinda like a couple of thin pieces of cardboard. Was that supposed to be up there and if so, out of curiosity, anyone know what it's for?

Thanks very much for everyone's help.

Kuro_Neko

[Skladfin]

that cardboard thing is a homemade shim to raise the rubber you see on top of the mag.

it makes better seal with the blowback unit so you get a stronger and crispier blowback.

[Kuro_Neko]

I see. Well it doesn't have that effect on this mag with this gun. But I guess there's some slight model differences between the M9 Elite IA and the M92F (which is what the mag is marked as). I only get about half the rounds out of that mag as I do with the two that came with the gun, and the blowback isn't as strong. I figure it's losing gas around the seal.

Kuro_Neko