US Army, Special Forces, Technical Manual, TM 9-1005-315-12&P, BLANK FIRING ATTACHMENT (BFA) M20, for CAL. .50 M85 MACHINE GUN, 1981
CHAPTER 1. INTRODUCTION
CHAPTER 2. OPERATING INSTRUCTIONS
Preventive Maintenance Checks and Services.
Installation of Blank Firing Attachment (BFA)
Loading Ammunition
Removal of Blank Firing Attachment (BFA)
Tool List
CHAPTER 3. MAINTENANCE INSTRUCTIONS
Lubrication
Trouble shooting
Repair of BFA
