Examples are on the talk page.
From the Parts names, there was supposed to be a semi-automatic sniper rifle title called Driver. Weapons generated with this part in game are also called Thunder.
Thunder is a Title bestowed to Sniper Rifles with high Damage. It is acquired from the part Title_Damage1_Thunder on Pump-Action Sniper Rifles, whereas it is Title_Damage1_Driver for Semi Automatic Sniper Rifles. The title has no effect on the weapon.