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DIY - Fix leaking GBB mags. (with pictures - 56k beware!)

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Old July 23rd, 2013, 17:54   #91
jordan7831
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Possibly, but it only does it with TM mags and not any other brand. KJW, KSC, and WE mags all fill perfectly.
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Old July 25th, 2013, 11:43   #92
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Does the magazine hiss after you've stopped filling?
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Old July 25th, 2013, 13:25   #93
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TM mags always piss (leak gas) while filling.
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Old July 25th, 2013, 13:58   #94
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The mags do not leak or hiss after filling, but the valves like to spew gas while filling. It's not a huge plume of propane, but it's enough that the mags are only filled about 1/3 of its normal capacity. Any suggestions would be kindly appreciated. Thank you!
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Old July 25th, 2013, 14:27   #95
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How long are you holding the tank on for? Try holding longer. They will leak/spew. It is normal for TM mags. You could consider new fill valves that have an oring on it or locate the tiny orings to add to the existing valves.
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Old July 30th, 2013, 07:32   #96
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Thanks Coach for that helpful post. I used plumber silicon grease since my Canadian Tires never have what you need.

Western arms M1911 mags.
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Old November 4th, 2013, 12:47   #97
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I did this on 4 KJW 1911 mags with great success.

Only difference is I did not fill any gas into it until it fully cured, as doing so would actually make a mess on the inside, if you are not over zealous with the gasket maker it will not ooze everywhere.

I let it cure for 3 days, and I had none of the gasket maker come out from any mag after filling it and releasing the pin to test for debris.
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Old January 29th, 2016, 15:49   #98
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Necro,

Did this few days ago on my leaky TM M&P9 mag as a last resort, let it cure for 24-48 hours. Worked brilliantly!

Cheers.
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Old October 16th, 2018, 10:41   #99
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I had poor luck lately fixing my mags and don’t have the patience anymore. Anyone good with fixing leaking mags from WA can PM me for the job ($).

I have 9 mags disassembled with more than 6 packs of brand new o-rings. Most of them leak from the outflow valve.
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Old June 29th, 2020, 19:16   #100
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hey guys. found this thread via google.

I'm trying to seal 4x Tokyo Marui M9A1 mags.

I took the bases off first, applied teflon tape, put the o-rings on, more teflon tape, lots of silicone oil on each step - still getting hissing / bubbling sound after filling the mags with propane.

I filled the mags hours ago and I can still hear some of them hissing from the base from across the room.

Only option left I can see is to use JB weld silicone - so do I strip the mag bases, clean with degreaser, apply the jb weld silicone sealant, put the o-ring on, put the jb weld silicone sealant on the inside of the mags too - insert the base into the mag, insert pins, put a bit of gas in, leave for 2 days to cure = fixed?

Edit: will this stuff work? https://www.amazon.co.uk/gp/product/...FKNPWYKI&psc=1

Last edited by paradoxum; June 29th, 2020 at 19:20..
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Old June 30th, 2020, 12:50   #101
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Quote:
Originally Posted by paradoxum View Post
hey guys. found this thread via google.

I'm trying to seal 4x Tokyo Marui M9A1 mags.

I took the bases off first, applied teflon tape, put the o-rings on, more teflon tape, lots of silicone oil on each step - still getting hissing / bubbling sound after filling the mags with propane.

I filled the mags hours ago and I can still hear some of them hissing from the base from across the room.

Only option left I can see is to use JB weld silicone - so do I strip the mag bases, clean with degreaser, apply the jb weld silicone sealant, put the o-ring on, put the jb weld silicone sealant on the inside of the mags too - insert the base into the mag, insert pins, put a bit of gas in, leave for 2 days to cure = fixed?

Edit: will this stuff work? https://www.amazon.co.uk/gp/product/...FKNPWYKI&psc=1

https://www.amazon.co.uk/Permatex-80...omotive&sr=1-6

You need blue gasket maker, put it on like the guide and let it cure for 24-48 hours.
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Old June 30th, 2020, 13:29   #102
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Quote:
Originally Posted by BioRage View Post
https://www.amazon.co.uk/Permatex-80...omotive&sr=1-6

You need blue gasket maker, put it on like the guide and let it cure for 24-48 hours.

Will this work? I already got it on the way https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1
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Old June 30th, 2020, 14:32   #103
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Quote:
Originally Posted by paradoxum View Post
Will this work? I already got it on the way https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1
Don't know, blue was hard to miss since the first post picture was blue to begin with lol.

Blue was also able to remove in-case it decides to leak in a few years time.

Best you can try it.
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Old June 30th, 2020, 15:07   #104
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There was another guide on here where they recommended permatex black as a more permanent solution. I found that to be the case as well.

As long as it is a sealant that does not react to silicone oil and other propellants it should be fine.
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