Bungie is showing what they have now. Most of what you have seen is Pre-Alpha and Jumping to conclusions or Assuming is pointless as the game is not even out yet. It took me two clicks for the Pistol you are describing as it is work in progress. Duke Mk.44 Revolver. This is one of many sidearms and will not be the only one. Just the one they have shown. Weapons are like swords in destiny. Many Kinds so assuming they have one type is just silly. Three weapons slots if you have paid attention will be available. It might be a pistol. Shotgun or SMG even an Assault Rifle. From what i understand each weapon is a reflection of you thus you can upgrade it and each has a tree getting more powerful when you use it.