Caliber is up to you! I chose .308.
E.R. Shaw 24" barrel-$200
Choate Tactical-$250 with DBM
Tac-Ops Cheek piece-$30
Caldwell 6-9in Bipod-$40
Kydex Cheek piece-Free because I made it.
Rifle Basix Trigger-$100
Even after the new trigger this would still be under $1500 unless I forgot something or added wrong
Plus building your own rifle is very rewarding!