Battlefield 3 magnum question in relation to real-life airsoft?

I am trying to create my ideal airsofting armory, and was wondering what I was going to do in the area of sidearms. I narrowed it down to either the G18 or the .44 magnum. (As seen in Battlefield 3.)

My question is derived from the LEGITIMACY of these guns. I need to find airsoft replicas of them… that actually represent the guns in Battlefield 3 closely. And I’ve been having some troubles with that.

I was comparing the top choices of airsoft guns I had for each, and wanted to see if fluther could help. The .44 (while currently out of stock) had two major things that bug me. 1: It obviously doesn’t have a scope, so I need to know what scope that is and how the hell to attach it, because the model I showed at the beginning did it with like… dark magic. 2: The barrels are different, and I need to know how to find an airsoft gun with the same barrel variant as in the previously shown model! Am I looking for the wrong gun here?

So, the deal with the G18, is that I just can’t find one. I can’t find any suppressed glock, much less a BF3 lookalike one… So yeah, that’s a problem.

Anywho, any/all help is appreciated. Thanks so much. :P