After they add 10 more top tier SPAAs of Finland and Norway to Sweden of course
I don’t think the Rh-105-20 as installed on this prototype is an actual functional gun. After looking through some sources and consulting with others, it would seem that the “Bofors Gun” with the square muzzle brake and thermal sleeve is probably just the same Rheinmetall gun but with the aforementioned changes made. Possibly Bofors was the one to do these modifications.
There is no footage or pictures of this version of the testbed Ikv 91-105 ever firing the gun, unlike the later version with the “Bofors” gun. Also of note is that this early version lacks the special mantlet that the actual Ikv 91-105 has. It also appears to be using a standard Ikv 91 hull and turret, with some modifications.
TL;DR: They’re likely the same gun, just with some modifications possibly done by Bofors. The early version being proposed is likely a non functional mockup. Just give the current Ikv 91-105 the APFSDS round.
The ingame Ikv 91-105 is infact using a Rheinmetall Rh 105-20 without the Rheinmetall addon kit.
Most likely just Strv 104 thermal-sleeve & bore evacuator together with one of BOFORS’ muzzle brakes they had developed for the UDES testbeds.
Said muzzle-brakes were apparently also more efficient than those offered by Rheinmetall (50% on a Rh 120 - Rheinmetalls muzzle brake reached a efficiency of 35% on the 105s) - which would explain why those were used on the prototype we know could fire.
(R.M Ogorkiewicz, Technology Of Tanks 1, p119-120)
Rheinmetall did offer an Rh 105-11 gun/upgrade kit (for any M68 or L7), however this gun featuered a recoil-travel of 925mm, which is a lot more than the 540mm (560mm) max of the Rh 105-20 and required the trunnion to be mounted much further forward and couldnt be easily integrated into most standard turrets.
(R.M Ogorkiewicz, Technology Of Tanks 1, p118)
There was another Ikv 91-based test-bed that featured a Rheinmetall LATS (LPTS) turret featuring the Rh 105-11 though.
Sadly, there is virtually 0 information on this other than a singular picture from Sheridan (R.P. Hunnicutt)
Now regarding the vehicle in this suggestion;
I hate to say it but this is most likely a mockup.
Looking at the pictures in the brochure and comparing the bore diameter with actual Rh 105-xx series cannons;
Brochure:
SK-105
Rheinmetall LATS (LPTS)
The hull-addon parts are also not unique to this vehicle, they were already present what is possibly the same vehicle prior.
The graphics and blueprints in the brochure also do not show the mockup addon-screens, but those that we can see on the functioning prototype:
Aside from these things, the gunner’s sight is also missing.
As for the brochures themself; I’d like to point out that they were the last ones Hägglunds had made for Ikv 91-105, before the project was canned.
Essentially everything thats in them, applies to our ingame version of the vehicle, this can be seen through e.g. the blueprints in particular - they only differ in the guns’ external appeareance aswell as the mantlet.
To summarize the vehicle that is shown on the brochures, I’ll just go with what SP15 said when he kindly discussed this topic with me, as it summarizes it quite well:
“a Ikv 91 with a bunch of plywood on it”
Naturally, we could be wrong, however everything points towards this being a mockup.
It’d ofc be great if we were to find some sort of firing-footage of the vehicle to disprove it, but for now, I do not see sufficient evidence that suggests this version to be fully functional.
As reference, here is the Ikv 91-105 prototype driving around & firing, aswell as the mockup driving around (with a fixed gun position).
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