Mccunn Specialty Firearms » Iowa Hunting Supply Stores Go back to directory. Add to Address Book. Mccunn Specialty Firearms Mccunn Specialty Firearms Work 74980 Richland Rd Massena IA 50853 work Work Phone: (712) 779-4867work Website: http://Mccunnsguns.Com Categories: Iowa, Massena Updated 7 years ago.