Sanctions against Russia have led to a ban on importing guns made in the country by Kalashnikov Concern, including the infamous AK-47 platform. Long touted as the most popular gun in the world, word of the sanctions set off a buying frenzy for the AKs already in the United States, driving prices up and inventories to zero.

Just in time to take advantage of the spiking interest in AKs coupled with empty shelves, Arsenal, Inc., announced that its flagship gun, the SLR-107FR, is...