Shot with several rounds of varying guns and calibers: Shot Gun, 9mm, 40 Cal, 357 Magnum. Nothing would go through the differential cover plus there were no cracks or stress points.
So we got out the high powered rifle. One AR15 hit the rib and didn’t go through. Then I put 2 AR15 rounds through it, still nothing. And finally it took a high powered rifle to get through the cover.
All shot at 25 yards. They are strong and we build them to protect your housing.