Cutaway model of a Belgian M50BG handgrenade, fuzed with a M2BG allways fuze. The handgrenade consists of a cast and machined steel body. A steel cap is screwed into the base. This cup has a threaded hole in it’s base, allowing it to screw a tail piece in base cap to change the handgrenade into a rifle grenade.
Length grenade body : 71mm
Length fuzed handgrenade : 109mm
Diameter grenade : 50mm
Weight grenade : 621 gram
Weight explosive charge : 50 gram TNT/Pottasium nitrate
The fuze used is the M2BG or M4BG all ways fuze. The fuze body is a two piece -upper and lower- Zamak cast which is machined to size. On the inside the brass all ways fuze parts are placed, consisting of a firing pin carrier in top which slides inside a primer carrier. The primer (red) and firing pin are kept apart by a weak spring. In safe condition a brass safety pin is placed through the top of the primer carrier, fixating the firing pin carrier in the upper position, preventing the firing pin from reaching the primer. To this safety pin, a hinged brass plate is connected to which a fabric arming ribbon is fixed. This ribbon is wound three times around an outer groove in the upper fuze body to keep the fuze in safe position. A flat lead weight is pressed over the other end of the ribbon. A brass protective cap with a pull ring is placed over the fuze housing, fixating the ribbon and keeping the fuze in safe position.
A detonator is placed in the base of the fuze and protrudes in the central well of the grenade body.
Functioning of the fuze:
Before throwing, the brass protective cap is removed by pulling it of the fuze housing by means of the pull ring. The index finger is placed on the lead weight to prevent te ribbon from unwinding, and the grenade is thrown. The ribbon unwinds and a small ejection spring pushes the brass safety pin away from the primer carrier, releasing the lead weight, ribbon and pin from the fuze all together. The fuze is now armed. It does not matter how the grenade lands, the fuze will always function; if the grenade lands on its bottom part, the firing pin is pushed into the primer, if the grenade lands on the top of the fuze, the primer moves into the firing pin, if the grenade lands on it’s side, both the chamfered sides of the firing pin carrier and the primer carrier move along the chamfered edges inside the Zamak fuze housing pushing the firing pin and firing cap toward one another. In all three cases the flame of the firing cap moves downward into the detonator
The detonator ignites the main charge in the grenade body.
Regards, DJH
Length grenade body : 71mm
Length fuzed handgrenade : 109mm
Diameter grenade : 50mm
Weight grenade : 621 gram
Weight explosive charge : 50 gram TNT/Pottasium nitrate
The fuze used is the M2BG or M4BG all ways fuze. The fuze body is a two piece -upper and lower- Zamak cast which is machined to size. On the inside the brass all ways fuze parts are placed, consisting of a firing pin carrier in top which slides inside a primer carrier. The primer (red) and firing pin are kept apart by a weak spring. In safe condition a brass safety pin is placed through the top of the primer carrier, fixating the firing pin carrier in the upper position, preventing the firing pin from reaching the primer. To this safety pin, a hinged brass plate is connected to which a fabric arming ribbon is fixed. This ribbon is wound three times around an outer groove in the upper fuze body to keep the fuze in safe position. A flat lead weight is pressed over the other end of the ribbon. A brass protective cap with a pull ring is placed over the fuze housing, fixating the ribbon and keeping the fuze in safe position.
A detonator is placed in the base of the fuze and protrudes in the central well of the grenade body.
Functioning of the fuze:
Before throwing, the brass protective cap is removed by pulling it of the fuze housing by means of the pull ring. The index finger is placed on the lead weight to prevent te ribbon from unwinding, and the grenade is thrown. The ribbon unwinds and a small ejection spring pushes the brass safety pin away from the primer carrier, releasing the lead weight, ribbon and pin from the fuze all together. The fuze is now armed. It does not matter how the grenade lands, the fuze will always function; if the grenade lands on its bottom part, the firing pin is pushed into the primer, if the grenade lands on the top of the fuze, the primer moves into the firing pin, if the grenade lands on it’s side, both the chamfered sides of the firing pin carrier and the primer carrier move along the chamfered edges inside the Zamak fuze housing pushing the firing pin and firing cap toward one another. In all three cases the flame of the firing cap moves downward into the detonator
The detonator ignites the main charge in the grenade body.
Regards, DJH
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