| Tail Number / N-Number | N121RM |
| Manufacturer | MCCOY |
| Model | ACRODUSTER II SA750 |
| Year Built | 1975 |
| Manufacturer's Serial Number | 1 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | I0360 SER A&C |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 200 hp (149 kW) |
| Average Cruising Speed | 105 miles per hour |
| Type of Registrant | Individual |
| Owner Name | KEENAN BRIAN M |
| Street | 4600 SUNSET CANYON PL |
| City | ALBUQUERQUE |
| State | NM |
| Zip Code | 87111 |
| Region | Southwestern |
| County | Bernalillo County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1977-07-29 |
| Certificate Issue Date | 2012-09-13 |
| Last Action Date | 2021-08-13 |
| Expiration Date | 2028-09-30 |
| Status | Valid Registration |
| Mode S Code | 50054354 |
| Mode S Code Hex | A058EC |