M777 155mm already on my work list two years ago (Can't get everything in unfortunately.) Your rough time frame about right and I think by early last year or a little sooner they also got the GPS targeting package as used by the USMC if memory serves. I think some of those other arty dates were incorporated in one of my refs but, it's been awhile.
https://www.defenseindustrydaily.com...owitzer-04829/
This was a key ref, however you'll see it's currently "locked out" for public viewing. I can log in but it wouldn't do any good here. Just keep checking back. However that being said in the upper left note the date it was last posted, beneath that was the latest update concerning the topic at hand. Looks like the date was maybe later. Have others...no worries!
Gotta go have a 0700 date with the range. Good Night!
Regards,
Pat