[majorairsofter]

i am having some problems with my ics mp5a5 i recently put upgrades into it and since then my gun has been shooting really slowly as in the bbs are not going far at all the upgrades i put in are element silent piston head, guardian shims, madbull 363mm 6.03 barrel, action metal ball bearing spring guide, action 1.5 joule spring, king arms high torque helical gear set, guarder steel cylinder head (2 O-rings). i am thinking that it is a problem with air seal but i have no idea.