For laughs, the final stage in reloading the Sagger on a BMP-1:
Unfolding the fins. Not visible - the stick the gunner's using to do so. The BMP-1 apparently has a stock bracket, just under the hatch, to hold the essential stick.
And edit to show something I think a lot of us forget:
The BMPs are indeed low and sexy ...
very low. Would not want to have to unass from that while under fire. Oh, and yes, the fuel tanks in the rear doors are well highlighted too.