The combination of printer/slicer/filament choice I am using was causing the tops of the original buckles to come out slightly deformed due to the 90 degree overhang. Some slicers have settings to compensate for overhangs like this but I figured this was easier to make than changing slicers or tuning my printer.
Initially printed out of ASA using a 0.4mm nozzle, 0.4mm line width, 0.2mm layer height. I would recommend at least 3 walls and top/bottom layers. The original design is very good in terms of printability so whatever works on your printer is probably fine.
The author remixed this model.
Redesigned the buckles to be slightly easier to print; changed the overhang near the clip opening to be a 45 degree chamfer, changed the fillet on the bottom of the print to be a chamfer, added a radius to the inside of the molle strap arms. I kept the rest of the dimensions the same except for making one of the edge radii slightly smaller (1mm to 0.5mm on the buckle clip edges).