Jack has carried two pistols throughout the entire run of the series. In Days 1 and 2, he carried a SIG P229. Later, in Days 3–6, he had a Heckler & Koch USP Compact, chambered in 9 mm. He has also used several different weapons occasionally, usually taken from terrorists or borrowed from SWAT team. These include (in approximate order of appearance) the regular Heckler & Koch USP, the Beretta 92FS, the Smith & Wesson Model 60, the Colt M4A1, the MAC-10, the Heckler & Koch G3, the Heckler & Koch G36C, the Heckler & Koch SR9T, the Smith & Wesson Model 66, the Accuracy International AWP, the AKMS, the Ruger Mini-14, the Heckler & Koch P2000, the Mossberg 590 and its Mariner variant, the SIG P225, the Heckler & Koch SL8, the Walther P99, the Mossberg 500, the Makarov PM, the Beretta Px4 Storm and the Heckler & Koch MP7.
An interesting note, however, is that although his weapon of choice in the later seasons has been the Heckler & Koch USP Compact, he has used the same model firearm - a Beretta 92FS - in several of the most monumental scenes of the entire series, including the interrogation of computer programmer Alex Hewitt towards the end of Day 2, the killing of Nina Myers, and the threatening of James Heller at the end of Day 6.[citation needed]
He also uses several knives, including the Microtech HALO III and improvised knives such as a pair of surgical scissors.[7] Throughout the latter series, Jack has used his messenger bag or "Jack Pack" to organize and carry all his field equipment