These actions are the ultra light weight action from Kelbly's. The Nanook will come available in Right Bolt- Right Port, Left Bolt-Left Port Cut for ADL/BDL Magazines, .338 Action will come cut for CIP length Magazine Comes in either Short or Long Action Available in .222, .308, .532, or .338 Boltface Come with 20 MOA Mil-Spec Picatinny rail, unless you get the .338 action that will come with 35 MOA Mil-Spec Picatinny Rail These actions come with all integral Recoil Lug and Picatinny Rail Finish will only come in Black Nitride