Chrome inside a machine gun barrel does extend useful life, but machine guns don't normally require fine accuracy, so when it starts cracking in the throat area it's no big deal.
Amen.... most folks would gasp if they saw what sorta abuse a MG goes thru on a single live fire exercise. They are a lot of fun to shoot, not so much to carry though.
As to their accuracy, I've seen a bunch of the M240G's stack plain old ball on top of one another while zeroing the ELCans using single loaded rounds. Trigger pulls are long but the guns themselves are heavy and when set up right are pretty solid.
