Initially, I was baffled by the fact that you claim that MP34 should have RoF at ~600 RPM, considering that I always felt that German MP34 was always more or less within the cyclic rate range that I could hear on the videos, and was trying to gather videos online to prove you wrong and that “german mains are trying to get something changed again while relying on english sources which are ‘oh so reliable’”. This video that I linked, however, was very recent and made me ask questions, so I had to dig deeper and pester @Killerwolf1024 like usual lol
So, there are two main patterns of the S1-100 SMG:
- the so-called “MP30”, named after the variant that was adopted by Austrian police and that conveniently describes the early pattern of the gun.
- and the so-called “MP34”, named after the variant that was adopted by Austrian army and that is probably the most prevalent one.
MP30 always had a long bolt, while for MP34 it depends. While technically MP34 is modular and can be reconfigured for different calibers, usually long bolts were used for more powerful ammunition while short bolts were used for 9mm Parabellum or 7.65mm Parabellum.
Related info from Killerwolf:
Spoiler
The theory that guns with long bolts appear to have a faster firing rate seems to be confirmed by several videos I’ve seen online. Notably, I am gonna mention Forgotten Weapons shooting video of the .45 ACP variant, which also includes a 9mm Steyr MP30.
According to my imprecise calculations, .45 ACP fires at ~600-650 RPM, 9mm Steyr at ~650-700.
This user’s MP30 in 9mm Para - according to my calculations, ~600 RPM:
MP34 9mm, ~514
MP34, ~514
that same video uploaded on YT (~470 RPM for MP34 9mm, ~530 for MP30 9mm, ~620-630 for MP30 7.63mm):
Also gonna link Small Arms Review article on the .45 ACP variant, since author also notices how it’s more faster firing than the usual 9mm Para MP34 you can find.
Cyclic Rate: Unknown at this time. I didn’t have the proper electronic measuring devices at the time of this writing but on firing the 45ACP model it was very audible to myself and by other firearm enthusiasts that the cycling rate was much faster. This was due to the nature of physics – basically looking at the physical dimensions of the 45 Bolt – it is larger and longer than the 9mm bolt, thus a shorter stroke or travel distance.
So, how does this all apply to this suggestion?
- German MP34 is already more or less realistic as is, at best it could have its damage or other stats tweaked.
- Japanese S1-100, on the other hand, on top of the ammunition change could also receive a very notable fire rate boost (to like 650 or even the claimed 700 RPM)
- The one variant for Germans that could have a higher rate of fire (and damage comparable to Kiraly) is a captured unmodified Austrian or Luftwaffe-specific MP34 due to it in theory having a long bolt and a powerful cartridge.