12 gram Co2 Cartridges Holder,12g Co2 Capsule Adapter for GBB Magazines,12 g Co2 Cyilnder Charging Adapter

Sharp thin edges on this . It cut my finger trying to tighten it by hand . Used gloves afterwards. Customer service was excellent. 5 stars for customer services..

Gets stuck in gun

The o rings that come with this adapter are cheap. Used it 2 times and they were all torn up. I had bought one like this from another company and had it for 2 years and no problem and would have bought from them again but they no longer sell these adapters.

This little adapter is great to keep in your backpack in case your normal tank has run completely empty. All you need to do is remove the old tank, thread this adapter in and then pop in a new C02 cylinder and you're ready to rock and roll

This seems precisely made, is very solid and working well. I don't shoot often, so end up always wasting CO2 as it leaks after just using part of the capsule, and don't like buying the big cartridges. But this lets me use 12 g capsules, which I have a stockpile of due to old air pistols, and are often the perfect size for light shooting. It works well, the rifle seems to have the same pressure and nothing leaking so far.