Got removed after the devs replaced it with the 20mm Oerlikon we all know and love today. Only difference between the 2 guns is the penetration with the Real and Fixed having worse penetration. (I cant remember what was fixed about it but its fixed i guess)

^ The 20mm real and fixed used to have 1000mm pen and 1 degree ricochet angle but caused too much lag and was reverted to the old 20mm Oerlikon stats