Originally Posted by Mladen
so i went out and bought a cleaning rod, and just like in the video i've been very careful not to damage the hop up by pushing the rod to far down the barrel; however the cleaning patches are coming back still pretty dirty, should i just continue with the patches or can i use some alcohol swabs and finish off with the silicon oil like in the video?
Alcohol will dissolve certain synthetic compounds... like your hop-up. I'd just use a little bit of silicone oil and keep at it. I've had to swab barrerls 6+ times on a new ACM gun to get all the crap out of the barrel.