Turn the marker on and air it up "make sure no balls are in it" and pull the trigger,if it fires everytime you pull the trigger then the eyes have a problem.. You can also turn the marker on ( take note of the lite flash speed and color) and see if it changes when put you finger down the feedneck/breach and block the beams from the eyes, if no change your eyes could be dirty....If you dont clean the eyes once in a while you could have issues as they will always think a ball is chambered..
WTF,why would i trade for that?
Ebay, camocow200 (1150+) + 100% positive feedback
MCB 290 pos feedback
"Mar" bro: welcome to the forum, super nice marker - hopeful for your sale.
"stargazer" It's ma'am actually, not bro.