The Norwegians are having trouble with the ultra-reliable HK416.
I'm not sure if I've pointed it out here, but nothing in the HK416 is revolutionary. Colt has developed and testing all these changes as planned product improvements for the M16/M4 series of weapons. The government didn't adopt the changes then because they didn't bear fruit. Now HK is trying to sell this stuff as the 416, largely by buying articles in Army Times. No thank you.