to the bolt the cradle stabilizes the cartridge so that fusing information may be transferred to the programmable cartridge application_number US 10405302 A description the present invention may be used with any weapon utilizing an open bolt firing mechanism for convenience the present invention is described with reference to an automatic weapon such as for example an mk19 grenade machine gun also know as a mk19 automatic grenade launcher the mk19 is mentioned only for exemplary purposes and is not intended to limit the scope of the invention in any way as shown in fig1 the present invention includes a fuze cradle 100 that supports the cartridge 110 both parts of the cartridge 110 are supported the projectile 120 is supported by the cradle 100 and the casing 115 is supported by the bolt face 130 a the bolt face 130 a may include a notch or ridge for receiving the bottom of the casing as shown in fig4 the cradle 100 makes galvanic contact with the cartridge 110 through contact pins 220 located at three different points the cradle 100 may include a mechanism for retaining the cartridge 110 in the cradle 100 the retaining mechanism may include the horizontally extending retaining members 210 shown in fig4 the retaining members 210 are biased upwardly into the position shown in fig4 the retaining members 210 move out of the way to allow the cartridge 110 to be placed in the cradle 100 during the firing sequence fig2 shows the bolt 130 at the rear of a housing for the firearm breech and firing mechanism i e receiver the receiver 400 is shown clearly in fig5 and 6 the cartridge 110 moves from a loading position as shown in fig1 to a.