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Post by corporalkitten on Jul 5, 2009 12:18:16 GMT -5
Hey, My brother has the AGM Mp44, real wood, and when it fires, in semi, there are like 3-4 shots that come out, and some of them just drop. 2 of 3 times the shots drop right as they exit the barrel. The same problem is on full auto. He has been using TSD .20g high polish bio- bb's and Excel high polish bio bb's and has lubed the gun and the magazine, to no result. Does anyone have any help or troubleshooting? I think it is either the magazine feed tube or the hop-up.
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Post by lrich on Jul 5, 2009 13:55:26 GMT -5
First, to clarify, when you say it fires in semi and there are like the 3-4 shots, does that mean the gearbox cycles 3-4 times, or that the gearbox cycles once, but 3-4 bbs come out? If it is the gearbox cycling a lot, it is a cutoff lever problem, if it is the 3-4 bbs, then i will launch into that. First, make sure you hop up is all the way off, and use a cleaning rod to go down the barrel, and push any bbs that are jammed up in there out. Next, use the cleaning rod to clean the barrel (to make sure no dirt was jamming up bbs) and try again. Keep the hop up off, as sometimes that can cause jams After you have done all this, and it doesn't help, look down the feed tube, every time you pull the trigger, does the nozzle you can see right before the hop up go back and forth exactly one time, everytime? If it does, and it still wont work, i am not sure of the problem, if it doesn't, you have a nozzle/tappet problem.
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Post by corporalkitten on Jul 5, 2009 14:47:33 GMT -5
Thanks, that covered what I needed to know. I'll try that. PS- it is 3-4 bb's come out of the barrel in semi auto, not the gearbox cycles 3-4 times.
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Post by corporalkitten on Jul 5, 2009 15:02:09 GMT -5
Sorry for double post, but we tried that, and it didn't work. Shoots once in semi, tip the barrel down and 2 bb's come out. the same for full auto bursts, but in some shots bb's that would be in the barrel come out and drop. My theory is that the nozzle is not making a full cycle, or somehow is letting more than one bb into the chamber at a time. This would create jamming like this. Thoughts?
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Post by lrich on Jul 5, 2009 15:51:48 GMT -5
That sounds like the nozzle is indeed letting two bb's in at once. That is probably the first thing i would check (it double cycling or not fully cycling). Unfortunately, you may have to chase problems, as double feeding can be caused from a dubiously shaped hop up unit (allowing 2 bbs in at once) to a broken/weak tappet plate spring thing.
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Post by corporalkitten on Jul 6, 2009 9:59:55 GMT -5
I'm not good with gearbox modification. I know the internals fairly well, but do not trust myself to fix (or break) my brother's gun. After looking at the magwell (after my double post) I came to the conclusion that the nozzle is not fully cycling. After shooting once in semi, the nozzle remains open, then I believe in the next shot it cycles back again instead of closing first. I do not know if that is possible in a gearbox, but that is my first thought of the problem.
PS- I could have posted this sooner, but who here has ever seen a triple post ;D
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Post by lrich on Jul 6, 2009 21:15:19 GMT -5
I have before, but it was me+dialup=triple repeating post. I haven't done three in a row that were different though, i use the edit button. And that does sound like your problem, but unfortunately, without the gun in my hands, i couldn't really tell you what the problem is. It could be anything from a crappy gear, pulling the thing back twice (had this happened when flashing worked as a second tappet plate puller), to an enlarged feed tube, allowing 2 bb's in on the cycle, an anti reversal latch that is allowing the nozzle to go forward twice per shot, etc.
I think your best bets are either bring it to an a local airsoft tech, do it yourself (mechbox.com has nice tutorials), or if you don't want to do either, sell it and use the proceeds on another gun. I personally would suggest doing it yourself, that way, you can gain valuable experience, and if you still can't get it to work, luckily for you, the MP44 is rarish, so it holds its value, even if a little screwy, and you could then sell it for a decent price, or, having gained experience but wasted no money, you could bring it to a Tech for repair.
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kalbs
Master sergeant
Posts: 1,142
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Post by kalbs on Jul 7, 2009 4:07:59 GMT -5
Sounds like the tappet plate may be broken or is not set properly on the nozzle. Also check the hop-up is set firmly in place and sliding forward
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Post by corporalkitten on Jul 7, 2009 9:49:47 GMT -5
Well, thanks for the advice. Remember, it is not my gun. It is my twin brother's. (I'm 3 minutes older) He would not let me TOUCH the thing If I tried to repair it. He just wants to send it in to ASGI and have their repair service take a look at it. I second that idea. They are professional and do what they do quite well honestly.
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