We have been developing a mount with Stu @ Cloverleaf Firearms Group that bolts the steel on at a 10* angle because of this. Our original mount was flat faced and during a class he had a few people catch fragments from 9mm, one suffered a decent cut on their leg. Since the new mounts no issues.
Just checked your site out, better prices than I've seen on Amazon. Will definitely be placing an order in the future.