The DE is not a gun you'd want for survival.
The clips are small (9 in .357, 8 in .44, 7 in .50), its heavy, the grip on the larger versions is simply too large for anybody's hands, the mechanism, while clever, is a nightmare to keep operating unless you give it constant maintenance, and .50AEs are weaker than modern revolver calibers ...
... not that it matters given its an 80's gun