M4A1-S | Master Piece appeared in CS:GO on July 1, 2014. It belongs to The Overpass Collection that includes 15 weapon finishes themed after the same-named map. This collection was introduced to the shooter with Operation Breakout.

A large part of the assault rifle’s surface is covered with spots in shades of blue. The yellow-red writing is applied to the receiver, though it's hard to discern what word it represents.

Float Value of the item can vary between 0.00 and 1.00, allowing it to be obtainable in any exterior quality category. As the weapon quality deteriorates, the assault rifle becomes faded, and its paint gets slightly erased. At high float values, the magazine and rear sight are most affected by wear, while the writing on the receiver remains relatively intact.

M4A1-S | Master Piece belongs to the “Classified” rarity grade and is available in a souvenir version. The skin is moderately popular among CS2 players.