Various Storylines (2008–2010)
On the October 30 episode of Impact!, The Machine Guns along with A.J. Styles, Samoa Joe, Jay Lethal, Consequences Creed, Petey Williams, Eric Young and ODB formed a faction of younger wrestlers called The TNA Front Line to oppose The Main Event Mafia.
At Turning Point, Shelley and Sabin received a shot at the TNA World Tag Team Championship, but were defeated by the champions Beer Money, Inc. (Robert Roode and James Storm), after their manager Jacqueline interfered in the match. Earlier in the evening they disrespected Mick Foley as he was addressing the TNA originals backstage. Despite this and other showings of disrespect, they remained fan favorites and a part of the team opposing the Main Event Mafia. However, they would turn heel months later attacking Lethal Consequences (Jay Lethal and Consequences Creed) after losing a tag team match to them. As part of their gimmick they were now described as "TNA Frontline members in name only". At Final Resolution, the Guns were attacked by the debuting Suicide
At Genesis, Shelley defeated Sabin in the finals of a tournament to become the new TNA X Division Champion. At Destination X, Shelley lost his X Division title to Suicide in an Ultimate X match that also involved Consequences Creed, Jay Lethal and Chris Sabin. The Guns and Lethal Consequences spent the next few months unsuccessfully trying to unmask Suicide, initially also claiming that he is Daniels.
On the August 6 episode of Impact!, Shelley and Sabin both turned face once again aligning themselves with Daniels against World Elite when an all out brawl broke out in the Impact! Zone. In September Shelley and Sabin began appearing as occasional commentators alongside Mike Tenay and Taz on Impact! broadcasts. At Bound for Glory the duo won the pre–show match against Lethal Consequences, and immediately afterwards competed in the Ultimate X match for the X Division Championship which was won by champion Amazing Red. On the following episode of Impact!, they won a tag team Ultimate X match against Lethal Consequences when Sabin retrieved the X, to become #1 contenders for the TNA World Tag Team Championships and challenged the champions British Invasion (Doug Williams and Brutus Magnus) at Turning Point. On the November 12 episode of Impact! Beer Money, Inc. defeated the British Invasion in a non–title match to join the Motor City Machine Guns in the Tag Team Title match at Turning Point. At the pay-per-view The British Invasion defeated Shelley and Sabin and Beer Money, Inc. in a three–way match to retain the TNA Tag Team Titles. The following month at Final Resolution the British Invasion defeated Shelley and Sabin to once again retain their titles. At Destination X the Machine Guns defeated Generation Me (Jeremy Buck and Max Buck) in an Ultimate X match to earn another shot at the TNA World Tag Team Championship. Shelley and Sabin received their title shot on the April 12 episode of Impact!, but were defeated by World Tag Team Champion Matt Morgan and Amazing Red, who replaced the injured Hernandez in the match.