Question: Mikhail Kalashnikov developed the AK-47, which is what type of device?

Context paragraphs:
PP-19 Bizon: The Bizon ("Bison") is a 9mm submachine gun developed in the early 1990s at Izhmash by a team of engineers headed by Victor Kalashnikov (son of the famous engineer Mikhail Kalashnikov, creator of the AK-47 & AK-74).  Alexei Dragunov, youngest son of Evgeny Dragunov (the creator of the SVD sniper rifle), was also a member of the design team.

Viktor Kalashnikov: Viktor Kalashnikov (Russian: Виктор Калашников ) is a Russian freelance journalist and a former KGB colonel.  In the autumn of 2010, he and his wife were treated in hospital in Germany for mercury poisoning in what they said had been an attempt on their lives by Russia's FSB, the successor to the KGB.  He is a distant relative of Mikhail Kalashnikov, the inventor of the AK-47.

Victor Kalashnikov: Victor Mikhailovich Kalashnikov (Russian: Ви́ктор Миха́йлович Кала́шников ; is a Russian small arms designer known for developing the PP-19 Bizon submachine guns.  He is the son of Mikhail Kalashnikov.

AKM: The AKM (Russian: Автомат Калашникова модернизированный , "Avtomat Kalashnikova modernizirovanniy ", 'Modernized Automatic Kalashnikov' ) is a 7.62mm assault rifle designed by Mikhail Kalashnikov.  It is a common modernized variant of the AK-47 rifle developed in the 1940s.

Mikhail Kalashnikov: Lieutenant-General Mikhail Timofeyevich Kalashnikov (Russian: Михаи́л Тимофе́евич Кала́шников ; ] ; 10 November 1919 – 23 December 2013) was a Russian general, inventor, military engineer, writer and small arms designer.  He is most famous for developing the AK-47 assault rifle and its improvements, the AKM and AK-74, as well as the PK machine gun and RPK light machine gun.

Type 58 assault rifle: The Type 58 is an assault rifle made in North Korea derived from the Soviet AK-47 designed by Mikhail Kalashnikov.  It uses a 7.62×39mm cartridge.  It is the longest version of the rifle at 890 mm, while the AK-47 is 870 mm.

RPK: The RPK ("Ruchnoy Pulemyot Kalashnikova", Russian: "Ручной пулемёт Калашникова" or "Kalashnikov hand-held machine gun") is a 7.62×39mm light machine gun of Soviet design, developed by Mikhail Kalashnikov in the late 1950s, parallel with the AKM assault rifle.  It was created as part of a program designed to standardize the small arms inventory of the Red Army, where it replaced the 7.62×39mm RPD light machine gun.  The RPK continues to be used by the armed forces of countries of the former Soviet Union and certain African and Asian nations.  The RPK was also manufactured in Bulgaria and Romania.

TKB-408: The TKB-408 was an early gas-operated prototype bullpup assault rifle with a tilting bolt.  It was created by German A. Korobov and submitted to a set of official trials conducted in 1946 to select an assault rifle for the Red Army.  None of the designs submitted to these trials were selected, although the AK-47 that was later adopted was a heavily modified variant of Mikhail Kalashnikov's AK-46.

Kalashnikov rifle: A Kalashnikov rifle is any one of a series of automatic rifles based on the original design of Mikhail Kalashnikov.  They are officially known in Russian as "Avtomat Kalashnikova" ("Kalashnikov's Automatic Gun"; Russian: Автома́т Кала́шникова ), but are widely known as Kalashnikovs, AKs, or in Russian slang, as a "Kalash".  They were originally manufactured in the Soviet Union, primarily by Izhmash, but these rifles and their variants are now manufactured in many other countries.

AK-47: The AK-47, or AK as it is officially known (Russian: Автомат Калашникова , "Avtomat Kalashnikova ", 'Kalashnikov's Automatic Rifle' ), also known as the Kalashnikov, is a selective-fire (semi-automatic and fully automatic), gas-operated 7.62×39mm assault rifle, developed in the Soviet Union by Mikhail Kalashnikov.  It is the originating firearm of the Kalashnikov rifle (or "AK") family.

Supporting paragraphs: AK-47 Mikhail Kalashnikov
Answer: assault rifle