I have a small fleet of tractor trailor, and converted two of them into an indoor shooting range. They are 2 lane with savage range systems target units that rotate 90 degrees. the inside has been renforced with bullet proof steel on all sides and back stop. with all material installed they are 15 yards.
NRA Certified Instructor: Rifle, Pistol, Shotgun
I am new on this site and not up to speed on personal messaging, but if you know the ropes perhaps you could PM me with specs and maybe some pictures?
Cliff