- Crew
- Four personnel listed for the M114A1E1/M114A2 on AFV Database
- Main armament
- M139 20 mm automatic gun, U.S. designation for the Hispano-Suiza HS.820
- Ammunition stowage
- 400 rounds of 20 mm ammunition carried in 25-round containers
- Secondary armament
- 7.62 mm M60 machine gun for the observer in the Lewis Army Museum summary
- Combat weight
- 15,678 lb / 7,111.5 kg for the M114A1E1/M114A2
- Engine
- Chevrolet V8 gasoline engine noted by Lewis Army Museum
- Mobility
- Amphibious and light enough for airdrop in Lewis Army Museum summary