Pierce and other U.S.S.S. Agents' main sidearm is the SIG-Sauer P229R, called the ".40 SS" in-game (despite the official Secret Service sidearm being chambered in .357 SIG and not .40 S&W.) The barrel of Pierce's P229 protrudes beyond the gun's frame, as if to indicate that a suppressor could potentially be attached, though suppressed weapons are unavailable in this game.
Glock 17
The Glock 17 is the second usable pistol in the game. Holds only 12 rounds. 12-rounded magazines do not exist for the Glock 17 in real life, only for the sub-compact Glock 26, however those magazines cannot be used with the full-sized Glock 17. Appears as "17A1". It is used by some of the terrorists.
The overall model of the gun is made after the 3rd Gen Glock 17, however it is shown without the under-barrel rail.
Heckler & Koch MP5A3
The MP5A3 is standard Secret Service submachine gun in the game including Agents whose connivance with mastermind. The rear sight is hooded as opposed to the drum sight on the real MP5. Referred to as "TS5-M4".
Mini Uzi
The "Costa-Sentavan" Ultranationalists also carry Mini Uzis. Appears as "UZI".
Custom AR-15
The standard carbine used by Secret Service and enemy troopers, based on the AR-15 platform. Referred to as the "TAR 5.56". Has a 16" heavy barrel, full-auto lower, LE stock, and HK416-style handguard. Equipped with a foregrip and Aimpoint sight.
AK-103
The "Costa-Sentavan" Ultranationalists carry AK-103 rifles in the game. Referred to as the "KFM 03". It is incorrectly modeled with an AK-47 (Type I) style gas block.
FN FAL
The FAL appears as "TCW .308" in the game and features a short barrel. It is a very rare weapon.
Remington 700P
The R700P is used by USSS Agent Pierce in the levels "Inaugural Assault", and "Last Stand". Referred to as the "M70 Sniper Rifle". The in-game Remington 700 is clearly the "P" variant, but it is shown with a 5-round detachable box magazine, like the R700 Export. (On a side note, the magazine it uses is much shorter than a 5-shot R700 magazine in real life.)
Mossberg 590 Compact Cruiser
The Mossberg 590 Compact Cruiser is featured in the game as one of the two pump-action shotguns. The weapon's model is directly from the developer's previous game Soldier of Fortune: Payback, with the foregrip and incorrect 7-shot capacity. The only difference is the weapon's name; in SoFP it was "CAWS-90", in this game it is called "CAWS-50".
Remington 870
The Remington 870 appears as the "CQC 800". It should be noted that the screw placement on the receiver is completely wrong for the 870 series.
The M26 Taser is used during the part when the player has to face some USSS Agents with questionable loyalties. Instead of firing two small dart-like electrodes, the in-game M26 fires hi-speed darts (that are not connected to the main unit). Has an unlimited range, can take out enemies from basically any distance. The real Taser has a range of 15-20 feet at max.