North Korean weaponry could allow Russia to prolong the storm of steel it has rained down on Ukraine but probably isn’t advanced enough to alter the course of the Kremlin’s war on its neighbor, now well into its second year.

Leader Kim Jong Un is expected to cross into Russia this week for his first trip outside the peninsula in four years for talks with President Vladimir Putin. The U.S. has said the meeting would focus on supplying munitions to Moscow.

While Pyongyang and Moscow have denied U.S. accusations of arms transfers, North Korea sits on some of the largest stockpiles of artillery and unguided rockets that could be used in the Soviet-era weaponry that Russia is already using to launch indiscriminate attacks on Ukraine.