A bullet stop and containment chamber for stopping the forward momentum of projectiles traveling in a generally horizontal zone of projectile travel. The bullet enters the wide end of a channel having plates which guide the bullet into a narrow opening which leads into a containment chamber. The containment chamber has a series of plates arranged with increasing angles of incidence such that the sequential impacts are increasingly direct. There are also side plates on the chamber which combine with the other structure to confine bullets, fragments and particulate matter to the chamber until inertial momentum is arrested and the bullet drops out of an egress.