In 1918 Borel responded to two specifications for fighter aircraft, one single seat with provision for a rear gunner and another two-seater.

[1] The C2 was a two-seat fighter very similar to the C1 but with a gun ring in a separate cockpit behind the pilot and a revised cabane strut arrangement.

The wooden fuselage was covered in fabric and housed two jettisonable fuel tanks and, initially, a ventral radiator for the closely cowled Hispano-Suiza 8Fb and fixed 7.7 mm (0.303 in) Vickers machine-gun.

[1] Testing of the Type 3000 revealed that the aircraft met the armament requirements of the specification and that the structure had a load factor of seven (could withstand 7g).

Despite exceeding the performance requirements the Type 3000 was not ordered for production due to the SPAD S.XX, beating Borel to the post, having been flown and tested in 1918.