That's part of the game. Have you played it? If you love guns you'll love the game. The initial names of the guns are different, but in the game is a LR300, SG550, 1911, SIG P220, USP, Browning HP, Beretta, VSS Vintorez, SVU, SVD, PMM, G36, F2000, AN94, and some more. All fully upgradeable. It's a FPS, Adventure, Survival game with RPG elements like inventory. Basically Fallout 3 with real life weapons (for the most part) and more realism. There's mods out there to add more weapons like a sniper rifle in .300 Winchester Mag, and to make it really realistic like the recoil. I got a mod for realism and the recoil doesn't reset (like Ghost Recon IIRC) so you'll have to move your crosshair down as you shoot to stay on target.
The game is really awesome. There's 3 of them, Shadows of Chernobyl (1st game), Clear Sky (2nd game, Prequel to 1st game), and Call of Pripyat (3rd game, sequel to 1st). It's about crazy shit in the radiated area of Chernobyl (mutants, bandits, etc.).
SoC is pretty cool. Starts slow and is kinda buggy, but bearable. Clear Sky is pretty fun, and Call of Pripyat is just flat out the best one.
You should get it. It's awesome.