=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 The weight of the radiator dropping from this height will usually loosen barrel sufficiently so that it can be withdrawn by hand from radiator after mouthpiece has been removed. =Gas Chamber Band.=—Lift out gas chamber band from its recess in radiator. Assembling. By reversing the operations for stripping the assembling of gun is readily and quickly carried out. The following points, however, should be noted:— 1. Be sure that gas chamber band is correctly inserted into its place in the radiator before barrel is pushed home, and that barrel is turned with gas port at bottom. 2. In replacing bolt and operating rod the cam slot in bolt is slipped over striker and feed operating stud is screwed into bolt as far as it will go. 3. After inserting bolt, rod, and charging handle, the charging handle is carried forward to extreme end of its stroke before gear casing is swung up into place and rack engaged. 4. The mainspring is wound up by engaging the rack and gear, disengaging the guard, and pulling back on the charging handle until the required tension is obtained. The gear is then disengaged, charging handle moved completely forward, gear re-engaged and guard pushed home. 5. To reduce tension of mainspring proceed as follows:— Remove buttstock. Disengage both guard and gear. Move charging handle part way back. Re-engage gear and guard. Replace buttstock. STOPPAGES.