The Beretta M9 appears in the game as the "Pistol", and is the first handgun in-game. In a odd design choice, the slide never moves when the pistol is either fired nor reloaded.
Smith & Wesson Model 629
The Smith & Wesson Model 629 appears in the game as the ".44 Magnum", and is the only revolver in the game. The .44 Magnum is the strongest handgun the player can find, using the .44 Cartridge. Strangely, the icon for the magnum has a silver color while the actual model is darker. Another odd thing is that the hammer seems to be non-functional, as it's never cocked or moves when the weapon is fired. Lastly, the description of the gun references the film Dirty Harry.
Submachine Guns
Heckler & Koch MP5SD6
The Heckler & Koch MP5SD6 appears in the game as the "SMG", and much like the other firearms it remains the only submachine gun in-game. Oddly though, the gun is never fired suppressed nor the "suppressor" hide the weapons flash.
Shotguns
Mossberg 500A
One of two shotguns in the game, the "Shotgun" is a Mossberg 500A Field Gun. It is one of the strongest weapons in the entire game, able to deliver devastating damage up close. Two variants are available: a standard full-length version, and a variant with a shortened barrel and a sawed-off stock. Like the .44 Magnum, the weapons are colorized in their icons, but their actual models are blackened.
Blunderbuss
The oldest weapon in the game (at least in terms of design), the Blunderbuss is the only gun in the game to not require weapon parts to craft; it appears to be completely handmade from various bits and pieces.
Assault Rifles
AKMS
The last of the rifles you can craft, the AKMS is also the only one to be fully automatic (at the cost of a very poor framerate). In-game it is identified as the "Ak 47".
Sniper Rifles
Remington R11 RSASS
The Remington R11 RSASS appears in the game as the "Sniper Rifle", and is the strongest of the two sniper rifles you can acquire in-game. Surprisingly, unlike the Magnum and Shotguns, both the icon and real-world model are the same color. Again, the weapon is fitted with a suppressor but it seems to just be there for cosmetic reasons.
Remington Model 700 BDL
The Remington Model 700 BDL appears in the game as the The "Hunting Rifle". Oddly, it can only fire one round before needing to be reloaded despite being based on a magazine fed rifle. In another odd design choice, you can't put a scope on it.