First of all - noob here when it comes to paintball. I did look at other similar threads but didn't want to hi-jack them and they seemed like different problems.

I ordered my first gun - A5 with response trigger installed already. I put on a double trigger, flatline barrel, and stock. I have a remote line with CO2 powering it. Bought some marballizers and took a few shots. The response trigger worked well. Held the trigger in and it would shoot.

I turned off the co2 - shot it until it ran out of gas and unhooked the line. I put the marker in my garage and left it there till about a week later. I hooked it back up and shot it - but this time it just shot single shots - every once in a while it would shoot like two shots. I couldn't just hold back the trigger.

I got out my manual - tried turning down the velocity half a turn. (I dont' have anyway to check the velocity but I heard the flatline should be a little lower. I am trying to get my hands on or find a chronograph) I then started to try turning the flow valve (don't know if that is the right term - the small valve your turn with the screw driver) to the trigger up and down. That didn't do anything.

I turned it closed as suggested in the manual and it would barely fire as the manual said. I started turning it open while popping off a shot every once in a while. I got the nob turned pretty far and the response trigger still didn't shoot when I would hold the trigger back. I didn't want to turn it too far. I'm curious as to how far people have turned there - like a couple full turns or what not. It was always one or two shots though.

I ended up playing like that and it was a blast (first time). Man that was fun.

But, I'm wondering if anyone has any advice before I attempt disassembling the handle and try checking the response parts as suggested in the manual. I'm wondering if it's a o-ring or something but I don't know why it would shoot once fine and then a week later - not shoot like it did.

I check the tube on the outside of the gun that seems to bring the air to the handle. It was connected well.

My garage did get cold - we had some 30 degree weather - but I brought my gun inside that day until we played and it was warmed up. Plus as the day went on it was in the 60's and the gun only ever shot one paintball with a trigger pull. Would the cold affect an o-ring? Before hooking it up the second time, I did put some gun oil on the top of the co2 tank before connecting it as someone suggested. Don't know if that may have done anything.

Any advice is appreciated.