Infantry Drills

G-65: Engagement From an Enclosure

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G-65. The M136A1 AT4CS is the only SLM proven safe for firing from enclosures; however, enclosures must meet the following specifications. (See figure G-31, page G-42.)

  • The inside area must be a minimum of 12 feet wide and 15 feet long (about 3.5 meters wide and 4.5 meters long).
  • The ceiling must be a minimum of seven feet (2.1 meters) high.
  • The window opening must be a minimum of 36 inches wide and 36 inches long (one meter wide and one meter long).
  • The door opening must be a minimum of 36 inches wide and 72 inches long (one meter wide and two meters long).
  • The structure should be of significant construction to withstand the munitions back blast.
Figure G-31. Minimal dimensions of a confined space

G-66. The following requirements must be followed when firing indoors:

  • Fire in the standing position only.
  • Cover or protect all equipment (example, small arms, radio set) in the room.
  • Remove any loose objects which might be thrown when firing from directly behind the launcher.
  • Keep stuffed furniture (example mattresses, cushions, pillows), to absorb pressure.
  • Hang a blanket 1.5 to two meters behind the launcher and 15 to 30 centimeters from the rear wall. This considerably reduces sound pressure.
  • Open all windows and doors in room.
  • Do not allow the angle of the launcher to exceed 20 degrees of depression from the horizontal plane. Do not fire the munitions at any angle of elevation. (See figure G-32.) Do not allow the angle of the launcher to exceed 45 degrees left or right of the vertical plane.
  • Wear combat arms earplugs.
  • Fire the munitions no more than 10 centimeters (four inches) from a door or window frame. (See figure G-32.)
Figure G-32. Angle of launcher

Next: G-67: Engagement from a Fighting Position

Go Back To: U.S. Army FM 3-21.8: The Infantry Rifle Platoon and Squad