M-1 Marushin Carbine O-rings needed?

[Sascha Gusdorf]

Hi All,
I've got a serious problem with my M-1 Marushin Carbine. It's gas powered, as you all know. It shoots like a beauty, and I absolutly love it! I've received many "kills" with it and still counting. Although, I'm am, in fact, encountering one, major problem. The Carbine's O-ring(s), I suspect, are in need of a changin'; when I load up both Green Gas, as well as 134 Gas, I hear the mags letting out a rather loud "ppsssssssssss". So, ya' know....... Do any of you know exactly what size o-rings I may need to repaire this issue? Any help you guys could give to me would be awsome. Thanks a bunch!
---Ben Bernard

[fennrisulfr]

Where is the gas leaking from? If it is leaking from the bottom fill and pressure release valves, changing the o-rings will not help as far as I know (Correct me if I'm wrong). I would have to do with the large rectangular seal in the bottom of the mag (if you've taken the mags apart, you know what i'm talking about.) I had the same problem and I ended up sealing off the pressure release valve with superglue from the inside. I then glued the large seal to the mag with a silicone sealer. This made the seal thicker since there was silicone glue between the metal and the seal, so when I put the bottom of the mag back on I had to push extra hard (because of the thicker seal) in order to get the metal pegs to go back in. I think it was this extra pressure that created a tighter seal. I use Green Gas and I now have no leaks what-so-ever. However, if your mag is not leaking from the fill/pressure releave valve: Ignore everything above! -Collin