u/Runmenot

Colt Lower
BCM 14.5 in enhanced lightweight Upper
LaRue MBT-2S Straight Bow Trigger
MBUS
Aimpoint Micro T-1
DD Grip
Geiselle Super Charging Handle
Magpul DT-PR carbine stock

300 BO subs through a Sig Hexium 300 ( I know, I know)

I just put a nee tube in my 60w Omtech CO2. I lined it up, cleaned the mirrors and lens. I’ve never encountered something like this. What is causing it?