Thanks for the precision
From the photos (Airsoft Sti) I think they are of the ASG "brand" (they rebrand guns made by other companies, and sometimes use trades as a marketing tool (look at their "Dan Wesson" Revolvers, they don't look like the real ones at all and are really just Wingun generic revolvers rebranded, for example)
If you get a well known brand such as Tokyo Marui for instance, you will definitely get a sliding trigger
The photo I put of the trigger is actually a patrt made for the Tokyo Marui "HiCapa" (2011)
They also replicate the way the frame is built; 2011 having just a "middle frame" to which the grip attaches, and the 1911 having a frame that includes the grip "shape" on which the "scales" are screwed into (sorry my English vocabulary is lacking in that area; basically like the frame of the pistols in your photos)
There's also Marushin that makes a shell electing 1911, with the correct trigger and all; they are much, much harder to come by though and expensive here due to their rarity and difficulty of importation
Hope this help!
Sorry for the thread hijack
:P