I have a 6 ARC upper with 20" barrel from Six Five Outfitters. I got everything from them except the adjustable gas block (they were out of stock). I killed a nice sow at 268 yards with factory 103 ELDX.

Browning X-Bolt .30-06
Leupold VX-3i 4.5-14x50 CDS

Tikka T3x Lite 308 win
Leupold VX-3i 4.5-14x50 CDS