This article needs more links to other articles to help integrate it into the wiki. Please help improve this article by adding links that are relevant to the context within the existing text.(May 2018)
Custom Parts are used to improve the factors that judge a weapon's performance, such as damage and reload speed. Their names normally indicate what factors they alter, such as "Damage". There are also multiple versions of Custom Parts modifying the same factors; they are identified by numbers (e.g. "Damage Lv. 2").
In Revelations the Custom Parts are also divided into categories, including "Illegal"; "Rare" and "Legendary" alongside the normal Custom Parts.