u/professor-choppa

Just picked up my brand new AP5, disassembled it to clean out the factory grease and found that the bolt carrier was super rusty. Haven’t put a single round through it yet. Anyone else have a similar experience? Tips to get this cleaned up without having to send it back or replace the part? I doubt it will cause any problems with the functionality of the gun but super disappointing to pop open a new gun to find this.