you cannot alter what attachments appear on guns sadly. attachments are random, but the Prefix in front of the weapon name give a clue as to what attachments are on it. Bayonets/Blades = more melee damage, alternative attack Scopes = increased accuracy, lots of different designs. Laser Sight = increased hip fire accuracy Pistol Stock = less recoil on Pistols Long Pistol Barrel = increased damage and accuracy on Pistol. Rotating Barrels = increased Fire Rate.