Abstract: A brech bolt for use in a gas powered gun features a plunger operated ball detent for releasably retaining the bolt in a breech closed position. A method is disclosed for assembling the ball detent.

Abstract: A block assembly is adapted to be removably fixed to a vertically disposed way of a machine having systems for automatically supplying lubricating oil to the way and for supplying a dissimilar liquid coolant to a workpiece; the block assembly serving to collect lubricating oil flowing downwardly along the machine way and prevent its contaminating the coolant. The block assembly comprises a multi-sectional block shaped to provide an oil collection reservoir adapted to be placed in flow communication with a separate oil collection tank or sump.