Castle - Season 6
The following weapons were used in Season 6 of the television series Castle:
SIG-Sauer P229 E2
Kate Beckett's (Stana Katic) SIG-Sauer P229R seems to change to the SIG-Sauer P229 E2 in some scenes. Other agents carry this pistol as well. This originally was marked as an original P229R but by looking at the photos below it is clear that the slide is of the more up to date E2 models.
Following her return to the NYPD, Kate goes back to carrying a Glock 19 in Season 6.
Heckler & Koch USP Compact
Tanfoglio TZ-75 Government
In "Number One Fan" (S6E04), Emma Riggs (Alicia Lagano) is seen with what appears to be a Tanfoglio TZ-75 Government (the compact variant of the Series 88), which was imported by F.I.E. into the United States.
A government agent carries a Mossberg 500 12 gauge shotgun during a raid in Season 6's premiere "Valkyrie" (S6E01).
In Season 6's finale "For Better or Worse" (S6E23), the leader of a biker gang wields a cut down Browning Auto-5 with a "mare's leg" style sawed-off stock & barrel. This shotgun is similar to the one used by Chuck Norris in the film Lone Wolf McQuade.
Heckler & Koch MP5A3
In Season 6's finale "For Better or Worse" (S6E23), another weapon used by bikers is the Heckler & Koch MP5A3.
Heckler & Koch MP5K
In Season 6's finale "For Better or Worse" (S6E23), another weapon used by bikers is the Heckler & Koch MP5K submachine gun.