Where's the BRDM? It's in my manual but is nowhere to be found in the game!

The OFP Field Manual, for the US version 1.20, documents a Soviet BRDM armored reconnaissance vehicle as one of the vehicles offered in the game. For whatever reason, it was not included in OFP V1.20 itself. The BRDM is now available as of OFP version 1.30.