|Genres||Melodic death metal
|Associated acts||Scar Symmetry, Miseration, Sonata Arctica, Mikael Stanne/Dark Tranquility, Divinefire, Hateform, Kotipelto, Mehida, Essence of Sorrow, The Few Against Many, Torchbearer, Ammotrack, Angel Blake, Incapacity, Unmoored, Solar Dawn, Scorched Earth Tactics|
|Past members||Mikko Härkin
Solution .45 is a metal supergroup from Sweden and Finland, created by guitarist Jani Stefanovic (Miseration, Divinefire, Essence of Sorrow). Their current lineup includes vocalist Christian Älvestam (Miseration, ex-Scar Symmetry), guitarists Stefanovic, Patrik Gardberg (Torchbearer, The Few Against Many, Ammotrack) and Tom Gardiner (Hateform), bassist Anders Edlund (Angel Blake), and drummer Rolf Pilve (Miseration, Essence of Sorrow).
In late 2007 Jani Stefanovic formed Solution .45, with Christian Älvestam (who had left Scar Symmetry in 2008) joining as one of its last members. Jani stresses that despite Christian's presence in the band, it will not be a Scar Symmetry clone and that songs had been ready for some time before his arrival. In the fall of 2008 an 8-track demo was produced by Tomas "Plec" Johansson (Unmoored, Scar Symmetry), with a demo track titled "Clandestinity Now" available over the internet.
Solution .45 entered Panic Room Studios in September 2009 to record its first full-length album For Aeons Past, with Dark Tranquillity vocalist Mikael Stanne writing lyrics for the majority of the album. The record was finished and mastered in December 2009, and was issued by AFM records in Europe and Marquee/Avalon in Japan; released on 9 April 2010 in Europe, and May 11 in North America.
On 23 January 2010, it was announced that the band was parting ways with keyboardist Mikko Härkin. Mikko still contributed keyboards to the record, but he is regarded as a guest musician on the album, rather than a permanent band member. Furthermore, it was announced on 29 May 2010 that Jani Stefanovic was leaving the band amicably, and Patrik Gardberg (from Torchbearer, The Few Against Many, and Ammotrack) would be his replacement. The band still wishes to involve Jani in future work, including future albums.
By 25 August 2010, Solution .45 had released a music video for "Gravitational Lensing". The video for "Lethean Tears" was initially set to launch in late 2010, but for undisclosed reasons, it was canceled. Latest news from Christian Älvestam, indicates that the production of the video was resumed in early February 2011, and the video should be released later in 2011. The video for "Lethean Tears" was released on 30 July 2011.
On 11 August 2011, it was announced that Stefanovic had returned to the band, which would now feature 3 guitarists (Stefanovic, Gardiner, and Gardberg). It has since been announced that Anders Edlund, the groups bassist, has departed from the group on mutual terms. 
- Christian Älvestam - vocals (Miseration, The Few Against Many, ex-Scar Symmetry)
- Jani Stefanovic - lead and rhythm guitars (Miseration, Divinefire, Essence of Sorrow, The Few Against Many)
- Patrik Gardberg - lead and rhythm guitars (Divinefire, Torchbearer, The Few Against Many, Ammotrack)
- Tom "Tomma" Gardiner - lead and rhythm guitars (Hateform, ex-Mors Principium Est)
- Rolf Pilve - drums (Miseration, Essence of Sorrow, Stratovarius)
- Mikko Härkin - keyboards (Symfonia, Kotipelto, ex-Sonata Arctica, Mehida)
- Anders Edlund - bass (Angel Blake, The Few Against Many)
- Marsicano, Dan. "Solution .45 - 'For Aeons Past'". About.com. Retrieved 16 March 2011.
- Rivadavia, Eduardo. "For Aeons Past". AllMusic. Rovi Corporation. Retrieved 2011-03-16.
- Rivadavia, Eduardo. "Solution .45". AllMusic. Rovi Corporation. Retrieved 2011-03-16.
- Sharpe-Young, Garry. "Solution .45". MusicMight. Retrieved 2011-03-16.
- "Solution .45 Guitarist: We're Not a SCAR SYMMETRY Copy", Blabbermouth.Net, Published Dec. 26, 2008. Accessed on July 20, 2009
- Neilstein, Vince (November 23, 2009). "SOLUTION.45 ARE ABOUT TO OFFER UP A EURO-METAL EXPLOSION!". Retrieved 26 November 2009.
- "SOLUTION.45 Signs Japanese Deal With MARQUEE/AVALON - June 29, 2009", Blabbermouth.com. Accessed on July 20, 2009
- "SOLUTION .45 Parts Ways With Guitarist, Announces Replacement". Blabbermouth.net. Roadrunner Records. 29 May 2010. Retrieved 23 June 2010.
- "SOLUTION .45 Parts Ways With Keyboardist"
- "SOLUTION .45's 'Gravitational Lensing' Video To Premiere This Friday". Blabbermouth.com. 25 August 2010. Retrieved 22 January 2011.
- "The Return!". Facebook.com. 11 August 2011. Retrieved 12 August 2011.