One of the neatest actions on a factory rifle is the Kimber 84-8400 model. Mauser Pre-1964 Winchester style extractor, Sako style adjustable firing pen. And a Model 70 type 3 position Safety. With the bolt closed in the action, Put the safety on center position remove bolt from action, With its indent and ball position lock, Just over ride the poppet ball and the firing pen screws out, Clean, lubricate, put back together. Great for bad weather hunting, The Mauser extractor may not give the accuracy wanted for long range shooting.