I'll try to make it shorter than Ty, it's rather a jam that happened, causing the piston not to be released fast enought before the sector gear starts another cycle. Take the unjamming rod, and without anymag inserted, push the rod into the barrel, most likely some BBs will fall off the hop-up unit. You have to make sure your barrel is always clean. I clean mine before each game, and twice or three time a day with my GBB-R (Oil in propane sticks with dust, so I don't take any chances)
|