Bullet trap systems receive projectiles fired thereinto and allow for the recovery of the projectiles. Specifically, the bullet trap systems include strategically-placed support structures for ensuring that the projectile entry path remains unblocked and further includes sidewalls in the projectile containment units to prevent traveling of projectiles within the projectile containment units to prevent or minimize damage within the projectile containment units. Moreover, one or more accessibility hatches may be provided to allow individuals to gain access to the interior of the bullet trap systems.