U.S. Army Technical Manual, TM 3-1310-243-10, CARTRIDGE, 40-MM: TACTICAL CS, M651, (NSN 1310-00-849-2083), 1975

U.S. Army Technical Manual, TM 3-1310-243-10, CARTRIDGE, 40-MM: TACTICAL CS, M651, (NSN 1310-00-849-2083), 1975


Use
Your M651 cartilage can be used in combat against any target vulnerable to its CS agent. Fire the cartridge from the M79
grenade launcher or the M203 grenade launcher which attaches to the M16A1 rifle. This cartridge is especially effective
when fired into an enclosed area. The projectiles will penetrate window glass or tip to 19 millimeters (3/4 inch) thick pine
wood at 200 meters (656 feet) and release CS after penetration. The projectiles will also function against other materials
such is earth gravel, brush, sandbags, and bamboo. You can engage targets at ranges up to 400 meters (1312 feet).
Section II. DESCRIPTION AND DATA
1-5. Description
a. Cartridge. The M651 cartridge (fig. 1-1) is similar in appearance to other 40-mm cartridges but has a flat nose.
Two ridges act as projectile rotating bands when the round is fired. The cartridge case contains a percussion primer and
has six equally spaced notches located around the cartridge case base.