ThomasP
Senior Master Sergeant
The 37mm M4 and M10 could both use articulated metal link belt feed. The first production P-39Ds were fitted with the belt feed, but production was quickly switched to the magazine type endless belt feed. The articulated metal belt feed arrangement only allowed 15 rounds of 37mm. The Russians received a bunch of the aircraft with the belt feed in their first Lend-Lease shipments. The image below is from the Mar'42 edition of the TM.
