This grenade, consisting of a rounded nose cap screwed to a cylindrical body, is equipped with four fins which are fixed to the base of the body. A brass or aluminum cartridge crimped to the grenade completes the assembly. A case containing the detonator and main filling is separated from a fixed firing pin in the nose of the grenade by a creep spring. The case is prevented from moving forward before firing by two metal balls in the base of the carrier. An arming rod inserted between the two balls prevents them from moving. This is forced out of the base by setback about ten or twelve yards after the grenade leaves the muzzle of the gun. The balls then slide out of their grooves and the case is free to move against the firing pin, exploding the grenade on impact.
| Overall length | 4.5 ins. | |
| Maximum diameter | 1 in. | |
| Color | Yellow | |
| Weight of complete round | 4.2 ozs. | |
| Weight of projectile | 3.2 ozs. | |
| Filler | T.N.T. | |
| Weight of filler | 0.25 oz. |
German: p. 324