F2A-1 - with Wright R-1820-34 Cyclone engine. Two guns above engine cowling, plus two optional guns in the wings, for the United States Navy, 11 built.
F2A-2 - with Wright R-1820-40 Cyclone engine. Four guns for the United States Navy and Marines, 43 built.
F2A-3 - Improved F2A-2 for the United States Navy with longer range and can carry two 100 lb bombs. 108 built.
B-239 - Export version of F2A-1 for Finland (Wright R-1820-G5 Cyclone engines and four guns), 44 built.
B-339B - Export version of F2A-2 for Belgium, 40 built (only two delivered to Belgium, the rest to the Royal Navy's Fleet Air Arm)
B-339C - Export version of F2A-2 for the Netherlands East Indies (Wright GR-1820-G-105 Cyclone engines). 24 built.
B-339D - Export version F2A-2 for the Netherlands East Indies (Wright R-1820-40 Cyclone engines with 1,200 hp). 48 built.
B-339E (Buffalo Mk I) - Export version of F2A-2 for RAF; RAAF and RNZAF (Wright GR-1820-G-105 Cyclone engines as the ; 170 built.
B-339-23 (B-439) - Export version of F2A-3 for the Netherlands East Indies (Wright GR-1820-G205A engines with 1,200 hp. 20 built (17 later to the RAAF, some used by the USAAF)