Piston.—The piston connecting pin is riveted in place, but may readily be punched out in case it is desired to remove piston.
Striker.—The striker may be withdrawn after punching out striker fixing pin.
Barrel Group.
Gas Regulator.—Lift out gas regulator key, then unscrew and remove gas regulator cup.
Clamp Ring.—Using the gas regulator key as a tool, unscrew clamp ring screw and remove clamp ring which carries front sight and clamp ring positioning screw.
Radiator Casing.—Pull forward radiator casing front, and pull back radiator casing rear which is permanently assembled to radiator casing rear locking piece.
Gas Cylinder.—Unscrew and remove gas cylinder, using operating rod as a wrench.
Gas Chamber.—Unscrew gas chamber, using, if necessary, barrel mouthpiece wrench.
Barrel Mouthpiece.—Unscrew barrel mouthpiece. Thread is left-handed.
Barrel.—Drive out barrel from radiator. This operation may conveniently be accomplished before removing barrel mouthpiece by unscrewing latter part way and then allowing barrel and radiator to drop from a height of two or three feet on to a solid piece of wood, striking on front end of barrel mouthpiece. The weight of the radiator dropping from this height will usually loosen barrel sufficiently so that it can be withdrawn by hand from radiator after mouthpiece has been removed.