MOUT projectile with sabot integrated shot start

A weapon system having a gun tube (108), a projectile (100) which is functionally connected to a discarding, single item sabot integrated with a unitary shot start (103) in a grooved region (106), and wherein said unitary shot start with sabot with projectile are subjected to gas pressure (118) to initiate a launch of said projectile, and wherein said unitary shot start with sabot has a unitary shot start tab (107) feature jutting out from said unitary shot start with sabot, and wherein said gun tube has a mating recessed area (112) to snugly receive said shot start tab when said projectile with unitary shot start with sabot are loaded into said gun tube, and wherein said shot start tab (107) has a distal section (105) connected to said unitary shot start with sabot through a cross-sectionally narrower section (109) of said tab, and wherein said narrower section thereby functions as a shear groove which allows the tab to shear off during initiation of a launch at a predetermined gas pressure acting on said unitary shot start with sabot and projectile, which predetermined pressure is sufficiently robust to effect a successful launch of said projectile, and wherein said tab inserted into said gun tube prevents a launch of said projectile before such predetermined gas pressure is exceeded.