Alpha Legion attack bikes
Alpha Legion attack bikes were used extensively throughout the Stygian Wars. Often they would form an advance assault element for major advances. They were also used as both a scout force and a raiding force throughout the Stygian wars in addition to a harrying force unleashed to run down retreating remnants of Imperial forces. The squadron above carries a good mix of anti armor and anti personal weaponry when coupled with their speed and maneuverability made them lethal to Imperial forces.
These are standard chaos bikers with a few swaps from the csm sprue. The lances are made from standard bearer arms with chainswords attached after being cut to fit. The shields are from the fantasy chaos warrior sprues.