who produced the modern bolt-action sniper rifle  which Steyr SSG 04 was the basis of
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.
Hartmann &amp; Weiss Hartmann & Weiss GmbH is a Hamburg-based custom sporting firearms maker founded in 1965. They make sporting arms, including shotguns, over and under, falling-block single rifles, and bolt-action rifles based on Mauser 98 and several other modern actions. They have produced small numbers of double rifles, in calibers from .375 H&H to the .600 Nitro Express.