Normally when the MSM says ‘inside Russia’ they mean in the occupied region of Crimea, because Putin has said that if other countries supply weapons for attacks inside Russia’s traditional boundaries, Putin will attack that country’s assets in the Ukraine and inside the borders of the supplying country.
Weapons from the US have been used to attack the occupied regions of the Crimea for months, but the MSM sometimes tries to make it seem like something new is happening.
Now, if attacks are to be enacted within Russia’s traditional borders, then that is a red line war escalation attempt. NATO seems to be trying to provoke Russia into acting by any means necessary.
What if Russian weapons are used by Russia, to attack another nation? I guess that doesn’t count.