A tu-tone Heckler & Koch USP was used by Daniel Graystone and the Zoe Avatar in the U-87 Cylon body in Season One, Episode Seven, "Ghosts in the Machine."
Walther P38
In Season One, Episode Seven, "Ghosts in the Machine", Heracles is seen carrying a Walther P38 into New Cap City. Joseph Adama calls it a "small gun."
Colt Python
A pair of Colt Python revolvers are carried by Joseph Adama and Emmanuelle into the burlesque club in Season One, Episode Seven, "Ghosts in the Machine."
Submachine Guns
MP-40
An MP40 is seen inside the arms locker of the burlesque club.
Kimel AP-9
A Kimel AP-9 is carried by Joseph Adama into the burlesque club.
KGP-9
A Hungarian KGP-9 carbine being repeatedly stripped and re-assembled by the Zoe Avatar in the U-87 Cylon body in Season One, Episode Seven, "Ghosts in the Machine." It has been dressed up by the show's armorers to resemble a weapon consistent with the Cylon design aesthetic.
Heckler & Koch MP5A3
Several Heckler & Koch MP5A3 submachine guns were carried by Global Defense Department operators in news footage in Season One, Episode Two, "Rebirth."
Sten Mk II
Assault Rifles
L85A1
An L85A1 can be seen in the hands of a Caprican police officer at the memorial to the maglev bombing in the Season One, Episode One, "Rebirth." The SA-80 was previously shown in Battlestar Galactica to be the standard-issue assault rifle of the Colonial Armed Forces with SA-80s being seen in the hands of a Colonial Fleet honour guard at Zak Adama's funeral in Season 1 and in the hands of Samuel Anders' resistance fighters on Caprica in Season 2.