The L/77 barrel is 95 kg. I dont know how heavy the L/57 barrel is.
I found a bunch of data on the 5,5 cm Gerät 58 (Flak 58), was it test mounted on something?
And iirc there should be some more info in the Bundesarchiv.
Interesting.
" 4cm Flak 28 (Bofors) L/60
This weapon was originally a 1924 Krupp development. The Reichswehr was not interested, and the gun was apparently sold to Sweden."
Big news, with the upcoming 2 part vehicles such as this
EldE 98: Missile Trolley we can suggest a pulling vehicle and a gun on a standart lafett, if it can be used in the pulling configuration. Such would be an example Sd.Kfz.7 with 8,8 cm Flak or so.
So maybe the Gerät 58 which also had its lafett build could potentially be suggested.
And maybe some other guns.
So for the Gerät 58 we would need to know what vehicle pulled it on the proving grounds.
Otherwise feel free to post here pictures of AA guns that are on a trailer or with trailer and pulled, that can be interesting and suggested after the update is live.
Maybe they did change to the full 37x380mmR casing?
By an earlyer chart with propellant testing they used an 735g round with some 392g, which is already more than the original 364g.
Google sayes the full length is however some 516,5mm, while the full length of the 341 is just 420mm.
So maybe it uses a full new casing? With a little math i come to a maybe 283,5 or 284 or 285mm case?