I am a bit
But....
M4/M4A1 Carbine is my favorite weapon of all time, it's the one "I'd" want at worlds end.
Compact, accurate enough IMO at ranges likely to be encountered in congested urban or vegetative environments, (not likely to end up in a desert or low scrub situation) brutal stopping power, semi-auto fire, robust, low maintenance, a real gem.
Could you post the specs for us skiller?