well, remember im new to paintball so im probably asking a question that seems simple but here goes nothing. i finally tested my used a-5 and it didn't re cock so i had to manually cock it each time. i took the whole thing apart, i mean everything and checked it out (wanted to see anyway lol) for any loose parts or foreign objects and didn't see anything wrong. well i put it all back together and now the gun functions great! what could have been the problem? could the gun just sitting for 8+ months have made it "lock up" or maybe shipping jammed something? i guess my question is what makes a gun not re cock after shooting if the co2 tank is NOT low?