Hi, i bought a JG T3-K3 air soft gun from airsplat.com its the one that costs $130.00 it needs a clean and also i want to change to a tightbore barrel but I dont know how to get to the barrel and it does not say in the manuel. Help? And also is this a G3 because all of the tightbore barrels at airsplat.com are for G3's or G3SAS