The natural shield against guns

I'll have to ask my friend for that. And to answer your question Infodude:

• If a monster has lvl 3 heavy stander, smashing it will do 1s.
• If a monster has lvl 3 heavy stander but lvl 2 natural shield, gun skills would activate lvl 2 natural shield, not lvl 3 heavy stander.

If a monster has lvl 3 heavy stander but no natural shield, guns will do full damage to the monster, taking protection into account of course. The update made it so that is no longer true. Cross Buster triggers just heavy stander and the other attacks trigger just natural shield.

Also, the most obvious indication we're getting the newer version of the skill is that r1 damage is 400%, not 500%.