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Post by twotypes on Mar 16, 2007 17:49:26 GMT -5
I got my MP-40 last weekend and have had a little time to start playing around with it, but I'm already having a problem getting BBs to feed. The mag fed at first, but now seem I seem to have a jam, as they don't spring out of it when I slide back the little switch on top of the mag next to the feed tube. The top BB just sits there. they also won't simply drop out when I invert the mag and tap or shake it.
I've tried slapping it against my hand to jar things loose, but no joy. Any advice before I try doing anything more drastic?
Cheers!
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Post by spitfire740 on Mar 16, 2007 23:54:58 GMT -5
your gun should have come with an "Unjamming rod." It's the greyish rod with the loop on one end and the slant on the other. Try sticking it down the barrel to see if there is a BB jammed in the hop-up. Also, I wouldn't suggest banging the gun against your hand, that could rattle the internals. Doesn't result on a positive note. I hope you find the problem.
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biged
Master sergeant 
Posts: 468
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Post by biged on Mar 17, 2007 4:26:27 GMT -5
Before opening up the mag.
1. Depress the bb retaining lever on the top of the mag and let as many of the bb's fall out.
2. Tap the mag on it's back, side, front and side again. Tap/hit it on a flat sturdy surface like a wooden step.
If it does not free up.
3. Load it up with bb's again using the loading tool. Apply alittle more pressure when you feel that it is full.
4. Start again with step 1.
Reloading and unloading should free-up the jam. Tapping the mag may also clear it. If all else fails you may have to open it up. If you have not taken a mag apart before, keep trying the loading & unloading. It make take up to an hour.
After you clear it, empty the mag completely and then shake it. If you hear anything rattling around a bb may have broken. Another culprit may be a staple. Either way it needs to be removed before using the mag again. If you don't hear anything, give it a 1-second burst of silicone spray down the fill tube. Load it and unload it again.
Always store your mags UNLOADED.
///ed///
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Post by twotypes on Mar 17, 2007 10:38:11 GMT -5
Thanks for the replies. Don't worry, I was never planning any "percussive maintenance" on the weapon itself, just the mags as described by biged. There were no obstructions in the barrel or hop up -- clean as a whistle. And I did get the mags (there were two) unloaded last night. I used the unjamming rod to shove the BBs down into the mag as deeply as I could, then let the rod slide out under the pressure of the mag spring. When it got to the top, I removed the tip from the tube with a quick flick of the hand and the BBs flew out on their own. This took a couple of tries on one mag. Bit of a mess, but at least they're unloaded. I'm going to give all the mags a shot of silicone before reloading. I'll eventually be opening up the mechbox to at least replace the factory grease as recommended, but I'll need to work my nerve up after reading the stories about parts flying across the room. Field stripping "real steel" sounds so much easier by comparison.  Thanks again folks. It was appreciated. Cheers! |
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Post by CharleyNovember on Mar 17, 2007 10:57:21 GMT -5
It's like working on a clock. Parts should not fly as long as you inset a small screwdriver into the back of the springguide as you carefully take the two halves apart....shouldn't |
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Post by twotypes on Mar 17, 2007 12:02:27 GMT -5
It's like working on a clock. Parts should not fly as long as you inset a small screwdriver into the back of the springguide as you carefully take the two halves apart....shouldn't "shouldn't?" Oh yeah, that fills me with confidence...NOT!  But still, thanks for the tip. ;D Cheers! |
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DeB
Private
AGM MP40 - Marui M733 and G3A4 Revenant
Posts: 179
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Post by DeB on Mar 18, 2007 9:29:36 GMT -5
There's no too much difficult to open a gearbox. Make it with calm and attention any way!
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