Our President has no backbone for confronting anybody.
Remember at the end of his first term, in the video where he tapped Russian Pres. Medvedev on the leg, and told him to wait for Obama's Second Term?
He is not about to try to boycott any Russian goods, and he know that even if he waited for the ATF to keep ammo in US ports (as with some civilian AK rifle parts kits), the Russians would soon hear about the ammo quarantine.