After searching through 10 pages of a possible 279 I've come to realise that these aim_ak-colt maps are well the basis of one map makers work, reworked about 200 times. There's so many of these maps.
Here is the nearest to yours I could find
http://www.fpsbanana.com/maps/16847 though the geo from this one is repeated in a hl1 engine version aswell
http://www.fpsbanana.com/maps/33314.
In this case I think the original was probably a prefab or something seeing as so many versions by so many authours.
So I think in this case its safe to say this version is Justedfun's and partly g'wd knows how many other authors.
To see what I mean search aim_ak-colt in fpsbanana.
All I can say is try, give your own touch, Its not a bad way to learn mapping making these aim_thingy's but its a simple enough map you could of added more your own flavour by making the geo different.
Having said that what you have done by adding npcs and oc scripted weapons etc is very good![/url]