Everything should be good except for the shells.
Hammer should be fine. RA Tech is where you should probably go for that, I know theres a guy who retails stuff from RA Tech but I believe you must be AV'ed to get parts from him.
Outer barrel although is legal for importation if the CBSA see's serial numbers on it may seize it. If they do then just appeal the seizure.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE