Former NASCAR driver Jeremy Mayfield had enough firepower inside of his home to equip a small army ... law enforcement tells TMZ.
We spoke with Captain Joel Fish of the Catawba County Sheriff's Dept. who tells us cops seized approximately 40 firearms during a search of Mayfield's North Carolina home last night.
Captain Fish says most of the guns were rifles and shotguns ... with a few handguns.
We're told the guns were seized so officials could determine if the weapons belong to Mayfield .... and if so, if they are properly registered.
As we previously reported, cops had searched the home on a warrant after receiving a tip about stolen property inside Mayfield's pad.
Captain Fish says cops seized all sorts of items they believe to have been stolen -- including Red Bull Racing gear, commercial sound equipment and industrial machinery. Cops also claim they found 1.5 grams of methamphetamine inside the house.
Mayfield was arrested for felony possession of meth. He was released after posting $3,000 bond.
Captain Fish tells us cops are still investigating the matter.