This download is purely stock, the weapons seen in the image are not included in the download.
This aircraft is extremely resilient. I was able to put it in a 1000m/s dive, pull 15 g’s, tear off the right fuselage and wing, and land what was left.
A stock aircraft called Heavy Fighter. Built with 71 of the finest parts, its root part is Mark1Cockpit.
Built in the SPH in KSP version 1.0.0.