
Month old VMP-2M: struggles to cycle at full auto.
Stock bucking. Stock 1J nozzle. All contact points were lubed with PTFE grease. It is 22°C. Mag filled with regular silicone-less green gas. With a room temp mag, it struggles to cycle full auto as well. After 2 bbs it fires dry and dumps gas out of the barrel and the bolt. Sometimes manages to feed a bb. It cycles perfectly in semi.
It's as if the pressure dropped severely after 2 full auto shots.