Nitrided Defiance Classic Short action, 308 bolt face, right bolt right port, and pinned .253" recoil lug. Extended ejection port, swept bolt handle, mini M16 extractor, plunger ejector. 416 SS action body, 4340 chrome moly bolt, deep right spiral flutes, small (.062) firing pin. 20moa aluminum Pic rail, Remington style magwell with feed lips for hinged floorplates, Remington style rear tang, cut for the Wyatt's extended box