Yes, A gun-type collision of subcritical masses does not need the timing of an implosion type warhead. Very easy to make once you have the enriched uranium. It would probably weigh in the 10,000 lb range. I have worked on the engineering on two intermediate range nuclear missile programs. I know quite a bit about the warhead designs, especially the safety and arming.
-It would probably weigh in the 10,000 lb range.-
5Kt vs 20 Kt. As a moron, I will accept that your value is closer.
-I have worked on the engineering on two intermediate range nuclear missile programs.-
Hmm, the W69 and W80 warheads maybe?