Eduard 1/72 scale mig 21 weapon sprue ( "C")?

[aurelien wolff]

Hello, today I got to my local model shop since it was liquidating due to closing, they had eduard 1/72 scale mig 21 pf so I decided to take it for a what if DDR ye 7 with a scheme inspired by Hatten mig 21 PFS (I saw upclose more than once, planning on using the jato boost on my what if, it was on the prototype). saw this huge unused pod on the sprue(part 15 and 36), now I'm wondering what it is, tank? camera pod for the R?

Thanks for your answer!
PS: I got 4 box from the shop

 

[GrauGeist]

That's an external drop tank.
I beleive it was 800 liter capacity.

 

[aurelien wolff]

ok thanks!