Its not the size thats matter...

[Zimme83]

..but the numbers of rockets you have:


MFI-9B (SE-EWE) in France in April -64, getting equipped w 2x 68mm rocket pods before being shipped to Benin along w 8 other MFi-9:s in order to form the backbone of the "Biafran air force" and taking on the Nigerian air force MiG-17 and Il-28:s, in total a handful of MiG:s and 3 Il-28 were destroyed on ground before the war ended for the loss of 2 MFI (one shot down by AAA and one destroyed on the ground.)

[DaveBB]

One was actually equipped with sidewinder missiles (or perhaps the french equivalent).  The pilot actually managed a Mig-17 kill by listening for the growl in headphones.

[Zimme83]

https://en.wikipedia.org/wiki/Malm%C3%B6_MFI-9