If the bolt carrier key is replaced, three to eight rounds of blank or ball ammunition must be fired to ensure a seal is created. Manual operation of the rifle may be required. If blank ammunition is utilized, M16A2 Blank Firing Attachment must be adapted
References FM 23-9
(item 3, app B) Field Maintenance Basic Less Power
Small Arms Shop Set (item 1, app B) Modified Needle Nose Pliers (fig E-7, app E)
Brush, cleaning, small (item 3, app D) Carbon removing compound (item 8, app D)
Cloth, abrasive (item 13, app D) Dichloromethane, technical (item 15, app D)
Dry cleaning solvent (item 16, app D) Gloves, chemical and oil protective (item
18, app D) Grease, molybdenum disulfide (item 19, app D)
Lubricant, solid film (item 21, app D) Pan, wash (item 24, app D) Polyethylene (item 32, app D) Sealing compound (item 28, app D) Target (item 31, app D)
3-15 Upper receiver and barrel assembly removed
2-43 Handguard assemblies removed
To avoid injury to your eyes, use care when removing and installing spring-loaded parts. When using solid film lubricant or dichloromethane, be sure the area is well ventilated. When using carbon removing compound, avoid skin contact If carbon removing compound comes in contact with the skin, wash thoroughly with running water Using a good lanolin base cream after exposure to the compound is helpful Using gloves and protective equipment is required.
Change 5 3-29
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