RostokMcSpoons
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- Sep 3, 2021
- 1,940
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I had a leaky gas mag on my VFC HK416 during the last skirmish day, I've finally got around to taking a look at it. And wish I hadn't, I've made matters worse 
The leak appeared to be from the fill valve, so I did what any normal bloke would do... I tightened it. The leak got worse so I tightened it some more - and then it failed. Looks like I've sheared it through the thread..
View attachment 114444
Which means (I guess) half the valve is now in the body of the mag and I'll need to extract it somehow. Any hints? (Or is it going to be easy and I shouldn't be asking dumb questions?)
Should I go with one of these:
https://www.fire-support.co.uk/product/guarder-magazine-gas-injection-valve-pack-of-two-for-kjwevfc
as a good replacement?
Edit: I took the mag apart as I realised that I needed to get some silicone grease on the o-rings and gaskets so they wouldn't irreparably dry out, so they're now stored in plastic bags ready for when the new fill valve is here.
This meant I could see what the fill valve looks like from inside the mag:
View attachment 114446
Sorry for the shit focus. The gouge marks on the barrel of the valve are my first attempts to undo from inside with a pair of needle-nose pliers. I can see it's moving, but the tiny room I have to work in means I can shift it about a twentieth of a turn at a time. This will be painfully slow work! I might pop out and buy some more svelte pliers in the hope I can turn it a bit more on each go, but really I need a more cunning method of unwinding it!
The leak appeared to be from the fill valve, so I did what any normal bloke would do... I tightened it. The leak got worse so I tightened it some more - and then it failed. Looks like I've sheared it through the thread..
View attachment 114444
Which means (I guess) half the valve is now in the body of the mag and I'll need to extract it somehow. Any hints? (Or is it going to be easy and I shouldn't be asking dumb questions?)
Should I go with one of these:
https://www.fire-support.co.uk/product/guarder-magazine-gas-injection-valve-pack-of-two-for-kjwevfc
as a good replacement?
Edit: I took the mag apart as I realised that I needed to get some silicone grease on the o-rings and gaskets so they wouldn't irreparably dry out, so they're now stored in plastic bags ready for when the new fill valve is here.
This meant I could see what the fill valve looks like from inside the mag:
View attachment 114446
Sorry for the shit focus. The gouge marks on the barrel of the valve are my first attempts to undo from inside with a pair of needle-nose pliers. I can see it's moving, but the tiny room I have to work in means I can shift it about a twentieth of a turn at a time. This will be painfully slow work! I might pop out and buy some more svelte pliers in the hope I can turn it a bit more on each go, but really I need a more cunning method of unwinding it!
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