Question: Princip used what type of gun to assassinate Franz Ferdinand?
About the article "Assassination of Archduke Franz Ferdinand of Austria", section "Shot dead".

Candidate passages:
  Nedeljko Čabrinović, for conspiring to assassinate Archduke Franz Ferdinand  Vaso Čubrilović, for conspiring to assassinate Archduke Franz Ferdinand  Veljko Čubrilović, for conspiring to assassinate Archduke Franz Ferdinand  Trifko Grabez, for conspiring to assassinate Archduke Franz Ferdinand  Danilo Ilić, for conspiring to assassinate Archduke Franz Ferdinand  Muhamed Mehmedbašić, for conspiring to assassinate Archduke Franz Ferdinand  Cvjetko Popović, for conspiring to assassinate Archduke Franz Ferdinand  Gavrilo Princip, for assassinating Archduke Franz Ferdinand  Nazario Sauro, for fighting for Italy in the First World War  
  Dragutin Dimitrijević Apis, leader of Black Hand organization.
Gavrilo Princip, Bosnian Serb nationalist, assassin of Archduke Franz Ferdinand of Austria  Nedeljko Čabrinović, one of the men sent to assassinate Archduke Franz Ferdinand of Austria  Trifko Grabež, one of the men sent to assassinate Archduke Franz Ferdinand of Austria  Vaso Čubrilović, one of the men sent to assassinate Archduke Franz Ferdinand of Austria  Cvjetko Popović, one of the men sent to assassinate Archduke Franz Ferdinand of Austria  Danilo Ilić, one of the men sent to assassinate Archduke Franz Ferdinand of Austria, the leader of the 8 men  Veljko Čubrilović, one of the men sent to assassinate Archduke Franz Ferdinand of Austria  Puniša Račić, parliament assassin of Stjepan Radić  Jovo Stanisavljević Čaruga, outlaw  Zvezdan Jovanović, former member of the Serbian special police, assassinated Serbian Minister Zoran Đinđić  Mijailo Mijailović, Swedish psychopath, assassin of Swedish Foreign Minister Anna Lindh  Arkan, warlord, organized cime  Kristijan Golubović, organized crime  Pink Panthers, jewel theft network  
The design was presented to arms manufacturer FN Herstal in 1898, with production commencing the following year (then under the designation "Modele 1899").
In 1900, an improved design featuring primarily a shorter barrel and wider grips was introduced as the M1900.
These designations were applied retroactively after FN began manufacture of other Browning pistol designs; initially the M1900 was marketed as simply the "Pistolet Browning" (Browning Pistol).
Production ceased only 11 years later, with a total of about 700,000 units having been produced.
United States President Theodore Roosevelt owned a mother of pearl-gripped M1900, which he regularly kept on his person and in his bedside drawer.
Eugen Schauman used an M1900 (serial number unknown) in his 1904 assassination of the Russian Governor-General of Finland at the time, Nikolai Ivanovich Bobrikov.
Contrary to many reports from various sources, an M1900 was "not" used to assassinate Archduke Franz Ferdinand of Austria in Sarajevo on June 28, 1914; the handgun used by Gavrilo Princip in that notorious incident was instead a FN 1910.
As initial reports said only that Princip had used a "Browning pistol", many newspaper illustrations erroneously depicted him firing the Model 1900.
An Jung-geun used an M1900 in his 1909 assassination of the Japanese Resident-General of Korea, Itō Hirobumi.
A Chinese copy of the gun saw usage during the Second Sino-Japanese War and the Chinese Civil War.
The North Korean Type 64 pistol is a copy of the M1900.
Specimens examined by western authorities were marked with the date of 1964.
A silenced variant was produced that featured a shortened slide to allow the threaded barrel to protrude far enough to attach the silencer. 
Danilo Ilić (1891 – 3 February 1915) was a Bosnian Serb, born in what is modern-day Bosnia and Herzegovina.
He attended the State Teachers' College in Sarajevo and for a while taught at a school in Bosnia.
In 1913, Ilić moved to Belgrade where he became a journalist and a member of the Black Hand secret society.
Ilić returned to Sarajevo in 1914 where he worked as editor of a local Serb newspaper.
He became a member of Mlada Bosna ("Young Bosnia").
He recruited Gavrilo Princip, Nedeljko Čabrinović, Vaso Čubrilović, Trifko Grabež, Muhamed Mehmedbašić, and Cvjetko Popović to assassinate Archduke Franz Ferdinand of Austria.
He and Gavrilo Princip were close friends.
On Sunday, 28 June 1914, Franz Ferdinand and Sophie von Chotkow were assassinated by Gavrilo Princip.
Princip and Nedeljko Čabrinović were captured and interrogated by the police.
They held out, but Ilić, who was picked up on a routine check, eventually broke down under pressure and named his fellow conspirators.
Muhamed Mehmedbašić managed to escape to Serbia but Veljko Čubrilović, Vaso Čubrilović, Cvijetko Popović and Miško Jovanović as well as Danilo Ilić were arrested and charged with treason and murder.
Eight of the men charged with treason and the murder of Archduke Franz Ferdinand were found guilty.
Under Austro-Hungarian law, capital punishment could not be imposed on someone who was under the age of twenty when they had committed the crime.
Nedjelko Čabrinović, Gavrilo Princip and Trifko Grabež therefore received the maximum penalty of twenty years, whereas Vaso Čubrilović got 16 years and Cvijetko Popović 13 years.
Illić, Veljko Čubrilovic and Miško Jovanović, who helped the assassins kill the royal couple, were executed at the Sarajevo barracks on 3 February 1915. 
After learning that the first assassination attempt had been unsuccessful, Princip thought about a position to assassinate the archduke on his return journey, and decided to move to a position in front of a nearby food shop (Schiller's delicatessen), near the Latin Bridge.
When Franz Ferdinand's car approached on its return journey, Princip stepped forward and fired two shots from a distance of about one and a half metres (5 feet) using a Belgian-made 9×17mm (.380 ACP) Fabrique Nationale model 1910 semi-automatic pistol.
Pistol serial numbers 19074, 19075, 19120 and 19126 were supplied to the assassins; Princip used #19074.
According to Albertini, "the first bullet wounded the Archduke in the jugular vein, the second inflicted an abdominal wound on the Duchess."
Princip was immediately arrested.
At his sentencing, Princip stated that his intention had been to kill Governor Potiorek, rather than Sophie.
Both victims remained seated upright, but dying while being driven to the Governor's residence for medical treatment.
As reported by Count Harrach, Franz Ferdinand's last words were "Sophie, Sophie!
Don't die!
Live for our children!"
followed by six or seven utterances of "It is nothing."
in response to Harrach's inquiry as to Franz Ferdinand's injury.
These utterances were followed by a long death rattle.
Sophie was dead on arrival at the Governor's residence.
Franz Ferdinand died 10 minutes later.