This will necessitate the removal of the extractor from the face of the lock casing. Release the lock spring, drive out the lock spring axis pin, remove the keeper bracket and extractor levers; next drive out the keeper pin of the extractor stop, remove the latter, and slide the extractor off the lock casing: push out the gib spring cover, and remove the spring or gib as the case may be. If the extractor spring requires replacing, drive out its fixing pin and remove. NOTE.—The serviceable components are replaced in the reverse order. STOPPAGES. 1. Temporary. Due to (_a_) Failure of some part of the gun of which a duplicate is carried, or faulty ammunition; (_b_) neglect on the part of member or members of the detachment. A high standard of training will avoid this. 2. Prolonged. Due to failure of some part of the gun which cannot, as a rule, be put right under fire, or without skilled assistance. In addition to the instructions in the “stoppage” table, the following points should be observed:— 1. If, when the cover is opened to investigate cause of stoppage, it is seen that extractor is not quite up, no attempt should be made to raise it. It should be first pushed down before the crank handle is turned over to the front, as by this means all risk of firing a cartridge accidentally is avoided. 2. When a temporary stoppage necessitates the employment of the spare lock, feed block, etc., the part which has been removed should be repaired as soon as possible, making it again available as a reserve. 3. Should it ever be necessary to release the lock spring, with the lock out of gear, this should be done with the extractor fully up, and firing pin hole opposite firing pin. 4. As the clearing of a stoppage often knocks the sights off the aiming mark, care should be taken that the gun is immediately relaid.