| Business | Phone |
| Darin's Gun Exchange 950 Randolph St, Napa 94559 | (707) 255-5166 |
| Last Gun Shop 1537 W Imola Ave, Napa 94559 | (707) 255-8965 |
| R & D Guns & Gunsmithing 1900 Jefferson St, Napa 94559 | (707) 257-1894 |
| The American Gunsmithing Institute 1325 Imola Ave. West Suite # 504, Napa 94559 | (800) 797-0867 |