Question: who produced the modern bolt-action sniper rifle  which Steyr SSG 04 was the basis of 

full_context: Document 1: Mannlicher–Schönauer: The Mannlicher–Schönauer (sometimes Anglicized as "Mannlicher Schoenauer," Hellenized as Τυφέκιον Μάνλιχερ or Όπλον Μάνλιχερ-Σενάουερ) is a type of rotary-magazine bolt-action rifle produced by Steyr Mannlicher for the Greek Army in 1903 and later was also used in small numbers by the Austro-Hungarian armies. Post war use was for civilian use such as hunting and target practice.
Document 2: Steyr M: The Steyr M is a series of semi-automatic pistols developed by Steyr Mannlicher GmbH & Co KG of Austria for police services and the civilian shooting market. Design work on the new pistol began in the early 1990s and the final product known as the M9 (adapted to fire the 9×19mm Parabellum cartridge) was officially unveiled in the spring of 1999. The M40 version chambered in .40 S&W was developed before the M9, followed later by the M357 (caliber .357 SIG or 9×22mm) and two smaller variants of the M9 and M40 designated the S9 and S40 respectively. These pistols were developed primarily for concealed carry and have a shortened barrel, slide, smaller frame and a reduced magazine capacity. In 2013 the Steyr M (Medium) and S (Small) form factors were complemented by the L (Large) sized series and the C (Compact) sized series both available in 9×19mm Parabellum and .40 S&W chamberings as the L9-A1, L40-A1, C9-A1 and C40-A1.
Document 3: Steyr SSG 69: The SSG 69 ("Scharfschützengewehr 69" = Sniper Rifle 69) is a bolt-action sniper rifle produced by Steyr Mannlicher that serves as the standard sniper rifle for the Austrian Army.
Document 4: Sterling SAR-87: The Sterling SAR-87 is a military assault rifle of the late Twentieth century. The Sterling Assault Rifle (SAR), which included elements from Sterling's earlier Light Automatic Rifle (LAR) design, was jointly engineered by Sterling Armaments Company and Chartered Industries of Singapore in the early 1980s as an advanced version of the AR-18 for the export sales. It was also offered to the British Armed Forces, who declined it because they were already in the process of adopting the SA80 bullpup design manufactured by Royal Ordnance Factories. The SAR-87 was a robust weapon based on the well tried AR-18 with the versatility of the M16 rifle. It could also be converted from 5.56×45mm NATO to 9×19mm Parabellum by changing the barrel and bolt assembly, to provide a submachine gun for Police forces. Sterling Armaments tried to push the rifle, renamed SAR-87, for some more years, but at the end of the 1980s, it was bought out by British Aerospace/Royal Ordnance and closed. Less than 100 SAR-87 rifles were manufactured.
Document 5: SV-98: The SV-98 ("Snaiperskaya Vintovka Model 1998") is a Russian bolt-action sniper rifle designed by Vladimir Stronskiy. In 2003 special operations troops were armed with the 7.62 mm 6S11 sniper system comprising the SV-98 sniper rifle (index 6V10) and 7N14 sniper enhanced penetration round. The rifle has been used in combat during operations in Chechnya.
Document 6: Steyr Mannlicher: Steyr Mannlicher is a firearms manufacturer based in Sankt Ulrich bei Steyr, Austria. Originally part of Steyr-Daimler-Puch, it became independent when the conglomerate was broken up in 1989.
Document 7: Steyr SSG 08: The Steyr SSG 08 (German: Scharfschützengewehr 2008, English: Sniper Rifle 08) is a modern bolt-action sniper rifle developed and produced by Steyr Mannlicher in Austria. The rifle is a further evolution of the SSG 04 sniper rifle, also developed and produced by Steyr.
Document 8: SIG SG 550: The SG 550 is an assault rifle manufactured by Swiss Arms AG (formerly a division of Schweizerische Industrie Gesellschaft now known as Sig Holding AG) of Neuhausen, Switzerland. "SG" is an abbreviation for "Sturmgewehr", or "assault rifle". The rifle is based on the earlier 5.56mm SG 540 and is also known as the Fass 90 ("Fusil d'assaut" 90/"Fucile d'assalto" 90) in French/Italian or Stgw 90 in German ("Sturmgewehr" 90).<ref name="SwissArms-SG550/PE90"> </ref>
Document 9: Steyr Scout: The Steyr Scout is a modern scoped bolt-action rifle manufactured by Steyr Mannlicher and chambered primarily for 7.62 NATO (.308 Winchester), although other chamberings are offered commercially. It is intended to fill the role of a versatile, lightweight all-around rifle as specified in Jeff Cooper's scout rifle concept. Apart from the barrel and action, it is made primarily of polymers and is designed to be accurate to at least 300–400 meters. The Steyr Scout is also available in 5.56 NATO (.223 Remington), .243 Winchester, .376 Steyr and 7mm-08 Remington.
Document 10: SIG SG 540: The SG 540 is a 5.56×45mm NATO assault rifle developed in the early 1970s by Schweizerische Industrie Gesellschaft (SIG, currently SAN Swiss Arms AG) based out of Neuhausen, Switzerland as a private venture primarily destined for export markets and as a potential replacement for the 7.5×55mm Swiss SG 510 automatic rifle known as the Stgw 57 in Swiss service.
Document 11: STG-556: The STG-556 is a Steyr AUG A1 a clone manufactured by Microtech Small Arms Research (MSAR). It was introduced at the 2007 SHOT Show. The STG-556's working system features a bolt release as seen on the M16 rifle; otherwise, the STG-556 retains the features similar to the Steyr AUG, such as having the quick-change barrel option and the ability to change which side the weapon ejects from by changing the bolt out for a right or left side bolt respectively. There is some parts interchangeability but the rifle is not a true clone. The STG-556 ships standard with right side ejector. The STG-556 is unable to use M16-style magazines or STANAG NATO standard magazines; they use versions of a proprietary MSAR magazine resembling the Steyr mags. The current production XM-17 E4 use STANAG magazines. The STG-556 is a short-stoke gas piston. The STG-556 rifle can be converted from either having a telescopic sight or a MIL-STD-1913 rail. It is available in civilian (semi-automatic only) and military/law enforcement (select-fire) variants.
Document 12: StG 44: The StG 44 (abbreviation of Sturmgewehr 44, "assault rifle 44") is a German selective-fire rifle developed during World War II. It is also known under the designations MP 43 and MP 44 ("Maschinenpistole 43", "Maschinenpistole 44" respectively).
Document 13: Remington MSR: The Modular Sniper Rifle, or MSR, is a bolt-action sniper rifle recently developed and produced by Remington Arms for the United States Army. It was introduced in 2009, and was designed to meet specific United States Army and USSOCOM Precision Sniper Rifle requirements. The MSR won the PSR competition, and is called the Remington Mk 21 Precision Sniper Rifle in U.S. military service.
Document 14: Steyr SSG 04: The Steyr SSG 04 (German: Scharfschützengewehr 2004, English: Sniper Rifle 04) is a modern bolt action sniper rifle developed and produced by Steyr Mannlicher in Austria, as a complement to Steyr's SSG 69, using the same Safe Bolt System (SBS) action developed for Steyr's hunting rifles. It is also the basis for the Steyr SSG 08 and Steyr SSG Carbon.
Document 15: GOL Sniper Magnum: The GOL-Sniper Magnum is a bolt-action sniper rifle designed by the German company Gol-Matic GmbH of Birkenau, Hessen. The rifle is available in tactical as well as sporting and match configurations. It is developed from Austrian Steyr SSG 69.
ground_truth: Steyr Mannlicher