sowjet self-propelled gun

[Jemiba]

In InterAvia 2/1959 I found this photo of two sowjet self-propelled guns. The caption says,
they for long-range ramjet powered rounds. The same type I found on http://forum.panzer-archiv.de/viewtopic.php?t=7492,
here described either as recoilless guns or mortars, capable of firing nuclear rounds.
It seems, that only those two examples were built. Any additional information ?

 

[Stranger_NN]

It's 406-mm SPG 2А3 "Конденсатор" (Объект 271), nuclear gun. Was released only four vehicle, but were replaced by missile systems. Do not be mistaken with 2Б1 "Ока", 420-mm nuclear mortar.

More precise: on the photo in the far distance - "Конденсатор". Near distance - "Ока". Differ cylinder recoil mechanism on the barrel "Конденсатор". "Ока" don't have it, because the mortar with a fixed barrel.
+ Additional photo of 2А3 "Конденсатор"

 

[Jemiba]

Many thanks ! Honestly I didn't realise, that the vehicle in the foreground
is a different one. Mobility seems to have been better, than that of the
US M 65 "Atomic Annie".

 

[Stranger_NN]

No, because this SPG did not pass any of the bridges or on overpasses, did not fit in the railway gauge, and could not turn around in the city.


Also, see my blog, there is an interesting, but russian only...

 

[Firefly 2]

There is some info on this page, about two thirds down.
http://airlandseaweapons.devhub.com/blog/category/artillery/page-3/

 

[Stranger_NN]

and another picture with a projectile

Pay attention to external shocks absorbers оf this 420-mm mortar

In addition: here's an image 406-mm cannon. No shock absorbers, but there recoil mechanism on the barrel.