The incorrect model of the XM5 was sent to me. I reached out on WatsApp and got a response after a few days but communication went dead shortly after.

[COWCOW Technology] Enhanced Plastic Loading Nozzle W/ Nozzle Valve Set[For Action Army AAP-01 GBB Series]
You sent me the wrong item, you ignored my emails and Messages and you didn’t give me a refund. I will never buy from you again. I will put a Bad Review on every Website warning people about you. Bye
It's a very light, yet very strong stick.
It's quite small and won't suit tall people, but the pivot mechanism has no play and the quality is top-notch.
The Rifle itself is fantastic, build quality is excellent. The service provided by Sixmm was also good received my rep a lot sooner then expected, so over all very happy!