Post by Doyley83 on May 24, 2023 17:56:38 GMT
Good evening fellow replica enthusiasts!
You may have seen a while back that there were some 'spares or repair' DPMS magazines that were going cheap on eBay. HeadHunter had a couple of them and they turned out to be fairly easy repairs. At that point I decided to take the plunge and get the other pair.
It seems my pair are not so simple to repair, with air leaking from the second CO2 port when loading a capsule into the correct 'insert first' port.
The first mag loses air quite gently from the 2nd port, the second magazine really goes for it.
I've completely disassembled the bottom half of the magazines and removed the gubbins from the second CO2 port housing. These are the components inside and the mechanism to pressure only one side and allow a 2nd piercing on the other -
It seems to be based on a ball bearing with what feels like a hard plastic (blue) seal that controls that inter-chamber gas mechanism. That BB is housed in a recess inside the magazine itself. Followed by a thin metal gauze filter (which isn't present on the other magazine I have been testing with so suspect this has been apart before), piercing piece then seal.
There are no replacements that I have found for the blue seal/BB or piercing part and filter, only the green seal which I have replaced and get the same result - air leaking the same way.
If I load an empty CO2 into the other chamber - no leak, so there is always potential to use with just one CO2, or be johnny on the spot with tightening up a 2nd.
Frustrating one - anyone here got any other ideas?
You may have seen a while back that there were some 'spares or repair' DPMS magazines that were going cheap on eBay. HeadHunter had a couple of them and they turned out to be fairly easy repairs. At that point I decided to take the plunge and get the other pair.
It seems my pair are not so simple to repair, with air leaking from the second CO2 port when loading a capsule into the correct 'insert first' port.
The first mag loses air quite gently from the 2nd port, the second magazine really goes for it.
I've completely disassembled the bottom half of the magazines and removed the gubbins from the second CO2 port housing. These are the components inside and the mechanism to pressure only one side and allow a 2nd piercing on the other -
It seems to be based on a ball bearing with what feels like a hard plastic (blue) seal that controls that inter-chamber gas mechanism. That BB is housed in a recess inside the magazine itself. Followed by a thin metal gauze filter (which isn't present on the other magazine I have been testing with so suspect this has been apart before), piercing piece then seal.
There are no replacements that I have found for the blue seal/BB or piercing part and filter, only the green seal which I have replaced and get the same result - air leaking the same way.
If I load an empty CO2 into the other chamber - no leak, so there is always potential to use with just one CO2, or be johnny on the spot with tightening up a 2nd.
Frustrating one - anyone here got any other ideas?
