Yes both the AMT Hardballer and the Killer 7 are based from the classic Browning 1911 design.
The Samurai Edge is a relatively simple modification to the already existing TM M9. It would be quite cool if they replicated some of the Resident Evil 4 originals, but I sort of doubt it. In Japan custom Resident Evil jobs on existing airsoft guns have a bit of popularity, but these are often consumer mods and not built from kits.
The Blacktail is oddly similar to the HFC Darkhawk:
The Red9 (my personal favorite) is a Mauser C-96, Marushin makes a NBB M712 which is the same gun with a removable magazine and select-fire function (single shot only on the airsoft version).
The Matilda, I believe, is meant to be a Heckler & Koch VP70, which is also avaiable in airsoft form as the Tanio-Koba VP70.
Other than that, the remaining handguns are quite unique and only bear a bit of resemblance to real-world firearms.
The 'Handgun' is reminiscent of a Ruger P series / USP, bearing similar grips to the STARS issued Beretta M92f/s.
The 'Broken Butterfly' (another favorite of mine) is reminiscent of a Schofield / Colt SAA.
The 'Punisher' is inspired by the FNH Five-seveN.
