| Tail Number / N-Number | N120AG |
| Manufacturer | MAULE |
| Model | M-5-235C |
| Year Built | 1979 |
| Manufacturer's Serial Number | 7295C |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | O-540-J1A5D |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 235 hp (175 kW) |
| Average Cruising Speed | 108 miles per hour |
| Type of Registrant | Individual |
| Owner Name | HALLMARK RONALD D |
| Street | 6928 COMSTOCK RD |
| City | SPRING HILL |
| State | TN |
| Zip Code | 37174-9201 |
| Region | Central |
| County | Maury County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1979-10-30 |
| Certificate Issue Date | 2017-12-27 |
| Last Action Date | 2020-07-15 |
| Expiration Date | 2027-12-31 |
| Status | Valid Registration |
| Mode S Code | 50051671 |
| Mode S Code Hex | A053B9 |