A latching box with options for loops to run carabiners through for hooking to harnesses or webbing. Assembly is 6 parts, modeled in Blender. Total size after assembly is 6" long, 2" tall and 4" wide. There are three sets of options for end caps; blank, slot loop and small loop. Small loops are placed to hold the latches facing up. Print with standard supports. Once initial layers were on the plate, I was able to print most of the assembly at Sport speed with no issues. For indoors/gym work, PLA is great. PETG recommended for outdoors use.

I've attached the original blender file. If you do any adjustments or improvements there, be sure to run it through the repair process in blender or it won't slice correctly.