Is 2k the barrier to entry when you’re talking 6.5 creedmor?
if you want to shoot that far, get a bolt action rifle...most ARs are going to be hard to hit with at that range unless you spend a lot of money and/or build it yourself nostr:npub1q6ya7kz84rfnw6yjmg5kyttuplwpauv43a9ug3cajztx4g0v48eqhtt3sh can give you some tips on building...but I would consider a platform style rifle in a better caliber such as 204 Ruger or maybe 6.5 creedmor
Discussion
https://savagearms.com/firearms/model/110-precision
for a chassis rifle mostly, but you could get a hunting rifle and add a bipod and scope and still shoot 600m for $1k or less
you will want a heavier barrel if you plan on shooting strings more than 5 or so, the barrel needs to be more rigid and it will heat more slowly