[John P Cooper]

Interesting question - here is sme additional information you may find helpful and may prompt someone to fully answer your question.


1) MG FF: Oerlikon Schweiz 20mm weighed 37 kg and fired 530 rds/min 100 rds weighed 33 kg (drum) or 21 kg (belt)

2) MG 151/20 Mauser 20mm weighed 42 kg and fired 630/720 rds/min 100 rds weighed 19.9 kg

So you could save about 150 kg for x2 MG FF if you remove the weapon and what ever bracket it was mounted with. (just a guess)

Cheers

John