Aero Precision SOLUS, Lightweight, Short Action, .540 Bolt Face, 416 Stainless Steel Construction, Nitride Finish, Black APBG310008C Elevate your next precision hunting build with the Solus Lightweight Action, the pinnacle of precision engineering. Drawing from the award-winning feature set of the Solus action, over half of a pound has been carved out from the receiver, coupled with a sleeker fluted bolt body and a perfectly balanced bolt knob. Aero Precision didn't stop at weight reduction; the true essence of the Solus Lightweight Action lies in the small details. Through a developed coating process and refined adjustments to the internal geometry this action is the smoothest cycling action with the lightest bolt lift on the market.