This doesn't mean the end of Russian ammo or guns as a whole.
It does mean no more Saigas, Veprs, or anything from Izmash/Kalashnikov Concern will be brought into the US until (if) the sanctions are lifted.
Tulammo, Barnaul, and Vympel are all GTG currently. That means the ammo is still coming in. Wolf is an American company, and they source a great amount of ammo from all over the world. If by some chance the Russian lead core ammo is sanctioned, there will still be plenty of steel case 7.62x39, 5.45x39, 9mm, .40, .45, etc. to chose from. Lately, most of the 7.62x39 I've been shooting has been SADU Romanian made ammo with sealed primers and bullets, and laquer cases!
Most of the Mosin Nagants that make it stateside are brought in from Ukraine, as is the surplus 7.62x54R ammo. We haven't been able to get our hands on surplus 7.62x54rmm ammunition directly from Russia (even though much of it was made in Russia) since the Clinton ban. It comes in mostly from Ukraine and Bulgaria, although Bulgaria has already liquidated much of it's old stock (5.45 and 7.62) since joining NATO.
If you're like me and shoot a high volume of steel case ammo through your AKs and ARs, this isn't the end. If you liked Saigas and VEPRs, well sorry. The main thing to do is not to spread panic, but to inform those who spew misinformation. I've seen multiple FB and forum posts over the last few days in which people have absolutely no idea what is going on, but yet they act as though they are professionals. We are our own worst enemies as gun owners. You can blame Obama, or Congress, or W. Bush, or whoever you want, but at the end of the day, if you haven't stocked up on ammo, magazines, parts, parts kits, components, etc., it's your fault for not being prepared.