Turbulence caused by firing of the HS-404 20mm cannon necessitated the installation of spanwise wing fences. The Oerlikon 8cm air-to-ground rocket was carried in packs of four under each wing of the M-1L.
The illustrious, world speed record holder 'The Spirit of Atlantic City' served with the 119thFIS/177thFIW before retirement to AMARG during August 1988. In 1992 it was converted into a drone, flying as such until it re-entered the boneyard in 1998.