A 34-year-old La Crosse man was arrested last week when he allegedly tried to sell some stolen weapons.
Duncan Wisland is accused of taking 174 firearms from units at an Onalaska storage company last month.
He is charged with burglary, theft and weapons possession.
The victim is a licensed firearms dealer who had dozens of handguns and rifles locked inside the storage unit.
The break in the case came when a law enforcement officer with another agency bought two of the stolen guns.
They were traced back to a gun store in Elk Mound and the store owner told investigators where he got them.