Model Variants (Including Prototypes)
Model 187 - Modified Light Bomber platform based on the Martin Maryland design.
Mk I - RAF use; initial production mark; sans power-operated dorsal turret; single 7.7mm machine gun in dorsal mount.
Mk II - RAF use; early production examples sans power-operated Boulton-Paul dorsal turret.
Mk III - RAF use; fitted with power-operated dorsal turret with 2 or 4 x 7.7mm machine guns.
Mk IIIA - RAF use based on the USAAF order of the A-30 Baltimore Light/Medium Bomber; fitted with Martin 250CE-brand turret fielding 2 x 12.7mm machine guns.
Mk IV - Based on the Mk IIIA model.
Mk V - Fitted with uprated Wright-brand GR-2600 powerplants; 12.7mm machine guns in wing mounts as opposed to 7.7mm caliber; appearing in 1944.
A-30 - USAAF Brand
A-30A - USAAF Brand
A-30A-10-MA - USAAF Brand
RA-30 - Reconnaissance Variant