Hello,
For modelers building both large scale ships and aircraft models, Black Cat Models is releasing a new series of 1/72 to 1/32 scale machine guns.
First references available is the complete German machine guns family, starting with the MG 15.
German 1/32 MG 15
AC32001a MG 15

Also the famous MG 81Z machine gun:
AC32004 MG 81Z

And the none less famous MG 131
https://blackcatmodels.eu/en/luftwaffe/757-german-mg-131-machine-gunx2.html

Also available are the regular MG 81, MG 17, MG 151/20 and MG FF 20mm gun. For guns using them, ammo belts are also provided with the kits.
On the British side, the first of a long Lewis family is available:
AC32008a Lewis Mark I MG

More such accessories are under way, with the release of a new 1/700 soon due.
Meow!!
Ben