Hey everybody, After a skirmish event, my airsoft rifle was not firing as accurately as I would recall previously. After returning home, I cleaned the 6.03mm brass barrel extensively following all the correct procedures that you would. I took it in my garden, which is about 10 meters (33 feet) to the end and started shooting. The gun would fire consistently, then fire a flyer about 2-4 inches away from the original grouping. There wasn't any pattern in the flyers, they just seemed to go off randomly throughout the 20+ shots. I don't believe it was the wind, as it was firing flyers both the left and the right of the target. My TM M9 was getting a higher grouping than the rifle, even though the barrel is one third the size and not a tight bore (I believe). I turned the hop down, and the shots accuracy and grouping seemed to improve. The range of the gun was not affected by the inconsistent accuracy, and the gun is still completely usable, just not as consistent as it previously was. From this point I could not see what could be causing the problem. I do not believe it is the hop up, but maybe the hop up is triggering something else that is causing inconsistency. I would be very grateful for any advice given. Thanks in advance. Jonathan *Edit When inspecting the barrel, I noticed a very small fibre that was sticking out from the side around the hop up area. It came out about about halfway across the barrel. The gun is G&G, meaning it had a green bucking, and this fibre was also green so i put two and two together and guessed it was a fibre from the bucking. Is this the problem? Will I need to get it repaired/replaced. Once again the gun is still very functional, and some people may just think it is paranoia, but from having the gun 6 months now, I can see that something is wrong.