The invention is a portable and modular shelter that are assembled and erected to serve as a background or expendable facade for range targets used in live ammunition target practice and combat exercises. The panels of the modular and portable shelter are ballistically designed to let rounds of ammunition pass through with as little damage to the panels as possible. Additionally, the panels do not cause the ballistic projectiles passing through to scatter, splashback, or ricochet. The modular and portable shelters have no lasting environmental impact if erected temporarily.