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Post by justified on Nov 20, 2011 11:07:20 GMT -5
So I dropped my mp5k magazine the other day and wouldn't you know that after I dropped it a little crack appeared and now gas leaks out of it not fast but enough to have a solid leak. Any tips on how to seal this hole?
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Post by TheEnd on Nov 21, 2011 17:31:05 GMT -5
Chances are it's junk.
The metal the mag is made of may not weld very well. If it's a form of cast pot metal (probably is) it will most likely just melt away instead of taking the weld. If it's a nice cast aluminum (I doubt it) it will require a lot of work. The silicone oil you put in the mag will need to be 100% completely removed. This means grinding out the crack, cleaning it completely, drilling a hole at each end of the crack to stop it from cracking further, and then TIG (preferred) welding it back together. Chances are you will have to pay someone to do it ($$).
If trying to fix it would make you feel good, you could throw some JB weld on it. I doubt it will hold but if it's junk anyway...
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Post by Knief on Nov 21, 2011 19:07:09 GMT -5
TheEnd,
I have little metal working experience, but would it be possible to solder this crack? Airsoft gasses don't run at very high pressure, and if the seam failed it would hardly be a catastrophic release. Could it be worth a shot since welding is a no-go?
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Post by TheEnd on Nov 21, 2011 20:14:43 GMT -5
Honestly I can't say for sure as I've never used solder to fix a crack before. The biggest issue I can think of is the silicone oil. I'm assuming he has used it when he filled up the mag, and now that the air has leaked out the crack is full of silicone. Trying to get the silicone off the walls of the crack so that anything will stick to it is going to be hard. It will most likely require grinding it out in a V shape at a minimum. Both ends of the crack will need to have a hole drilled to prevent the crack from getting larger.
It might also be a problem when the mag cools down that the solder might cool down at a different rate and pop right out. I also question the solders ability to stick to the body of the mag, but like I said I have never used it to fix a crack.
All of my metal work experience has been done working on cars. It's possible my repair is overkill for a GBB mag.
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Post by BoredKender on Nov 21, 2011 20:25:40 GMT -5
I wouldn't try to use solder to fix a crack. Try JB weld or another epoxy.
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Post by El Phantasamo on Nov 23, 2011 17:30:39 GMT -5
There are some "solders" on the market that work with "pot metal", but the results are hit and miss. It's all in the prep work, if it's not nice and clean then it wont hold.
JB weld is (to me) A better option, but you still have to have all the silicone removed from the surface you want to bond.
If this is one of those clones of the Maruzen MP5K, id like to see pictures of the damaged area. I have A "Parts Mag" for one, and may have a spare part to replace your damaged one.
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Post by justified on Nov 27, 2011 15:41:26 GMT -5
Sorry I haven't got a pic yet but what cracked is the bottom corner bottom left side.
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Post by El Phantasamo on Dec 1, 2011 20:54:57 GMT -5
Sorry I haven't got a pic yet but what cracked is the bottom corner bottom left side. If its the bottom plate, I have a spare. If its the magazine body, you can remove the "extension section", use a shorter brass tube (I have a spare), trim the feed spring, and have a functional "short mag". Pictures are still helpful. |
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Post by Dahm on Dec 2, 2011 1:26:04 GMT -5
I would give the disassembled mag a nice bath for 15-20 minutes in turpentine, and then and use a brush to remove any extra silicon debris. After that, JB weld should do the trick.
Best of luck.
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Post by El Phantasamo on Dec 2, 2011 10:59:28 GMT -5
I would give the disassembled mag a nice bath for 15-20 minutes in turpentine, and then and use a brush to remove any extra silicon debris. After that, JB weld should do the trick. Best of luck. Turpentine can leave a residue, I prefer Lacquer thinner (IT WILL DAMAGE SEALS AND REMOVE PAINT). Also lightly sand the area you need to JB weld, as this will give the epoxy something to "grip" to. |
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Post by justified on Dec 6, 2011 14:28:17 GMT -5
Ill try these and it would be the base plate as well as the side of one.
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Post by El Phantasamo on Dec 17, 2011 18:49:27 GMT -5
Ill try these and it would be the base plate as well as the side of one. I have a spare base plate if you need it..... |
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Post by justified on Dec 18, 2011 9:34:21 GMT -5
I actually lost the magazine so guess this is a little pointless now.
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- MIA chat 05/10/06 at 9:30pm
