dark angels tactical squad equipment include bolt pistol and boltgun. The sergeant may take items from the melee and / or ranged section of wargear.
Melee weapons says a model can replace one weapon with one of the following, chainsword is listed as free.
Ranged weapons say a model can replace a bolt pistol or close combat weapon for one of the following, plasma pistol is included.
Can I replace the boltgun with a chainsword and then replace the chainsword with a plasma pistol giving my model both a bolt pistol and plasma pistol?