I made a video on how to make a stone guard for the 2015 RZR 900 50 inch trail model.
You will need:
4 – 1/2 inch Spacers that 6MM bolt will pass thru
4 – 6MM 1.0 x 25 Bolts
4 – M-6 Flat Washer
Radiator Honeycomb 19" x 26" (1/2 inch thick) Allstar Performance # 30158
Template size – 15 5/8" wide by 13 7/8" high
piece of window screen material, big enough to cover back of radiator fan

If anyone would like to watch it here is the link.