Lord Saladin's Iron Banner shop - random perks?

This week the Iron Banner is back in Destiny, but I have a question about the way the loot he offers in his shop have 'random' perks.

If a weapon is on sale in his shop, and you can see the perks it has, is this the one you'd receive if you bought it?

I understand you can re-roll the perks if you aren't happy...

What you see in the shop is what you will get. This is the same as every other vendor, he isn't any different.

The only difference he has is that you can reroll the perks by equipping the weapon and then an option will appear in his interface.

You do also get random perks if you get the weapon as a reward after a match rather than buying it. You probably already know this but I'm adding it for completion.

When rerolling via Iron Banner and when getting weapons from random drops (eg decoding engram) the element can be randomised as well if it is not kinetic.