Interesting error in the art work. The rear supports don't reach the ground, they should otherwise, what's the point. Also, from research I've done on the 6/2 the shields were usually removed. This saved weight, and there wasn't any need because they weren't used in ground combat, but at Luftwaffe sites.
I'm doing a review of the Bronco 6/2 3.7 cm Flak 36 that is quite similar. Should be ready in a week or so. I'm building it as my entry in the "shoots back" campaign.