I just got this email back today from Leupold about this product.
I get the impression John (of Leupold) has sent a lot of rounds down range with a MK 4 while in the Army.
"It doesn’t look like it will do anything to integrity of the scope. It’s pretty ninja if you ask me, I say go for it! Thanks for showing this to me, We love to see what is going on with our optics in the wild lol." John warren
TECHNICAL SERVICES/CUSTOM SHOP REP
14400 NW Greenbrier Pkwy
Beaverton, OR 97006-5790 USA
jwarren
leupold.com | www.leupold.com"