A Nevada assemblyman who was banned from the Legislature building attempted to buy a gun at Scheel's Sporting Goods Thursday night in Sparks.Assemblyman Steven Brooks allegedly tried to buy a hunting-style rifle at the sporting goods store, Sheriff Ken Furlong said. “The transaction did not go through,” Furlong said of the attempted purchase.State officials told the Associated Press they have initiated a routine background check to determine whether Brooks can purchase the rifle.The Nevada Department of Public Safety's Record and Technology Division hopes to determine by Tuesday whether there are any “disqualifying factors” that would prevent Brooks from buying the …