So I got some range time in yesterday. I had the abuse the crap out of the AUG mags to get them to pop a cartridge. Unless dropped, I couldn’t get any to pop a cartridge. I inserted mags with the bolt retracted and smacked the crap out of them, no issues what so ever.
Have you thought of detail stripping your AUG? Soak and clean the disassembled bolt in low odor mineral spirits to remove the preservative oil. It can get gummy and cause issues if not removed. It usually gives parts a brown or rust colored look to them.