Review on HK Quick-Change CO2 Cartridge Adapter for SIG SAUER MPX 💨 and MCX Air Gun Rifle with 88g or 90g Bottle Threads by Tyler Owens

Purchased for Sig MPX. The product arrived on time - overnight! It has been well machined and anodized. I'm a machinist and that's impressive for a Chinese product. It might take about a millimeter longer from the gun's sealing surface to the hex, but it fit into the receiver with little interference when screwed all the way in. The hammer worked well and I got exactly one cylinder (42 rounds) before take off. from CO2. So far, so good. From that moment I couldn't seal it anymore. I'm assuming the o-ring is made of a material that won't withstand the temperatures associated with Co2. It came with spare o-rings but I couldn't get it to reseal. After 3 cylinders I gave up. It's a shame because this is exactly the product I was looking for. I returned it.