Description
It’s an Acapello CSM… on a Koyuz launcher?!
A stock rocket called Acapoyuz. Built with 116 of the finest parts, its root part is LiquidEngineLV-T91.
Basically a modified Acapello CSM mated to the Koyuz 1 core and booster stages; the Koyuz core has been stretched, and a flared adapter added, to smoothly join it with the wider Acapello CSM and raise the latter safely above the tips of the Koyuz boosters.
Built in the VAB in KSP version 1.9.0.