The M4A1-S | Master Piece is a Classified rifle skin from The Overpass Collection, distributed through the ESL One Cologne 2014 Overpass Souvenir Package.

All five wear conditions are obtainable for M4A1-S | Master Piece, with float values spanning 0.00 to 1.00 — Factory New examples sit at the cleanest end of that range, while Battle-Scarred copies show the most visible wear.

A Souvenir version is available, dropped exclusively from cases collected during Major Championship matches and stamped with that tournament's stickers. Active listings for M4A1-S | Master Piece are tracked across 18 marketplaces, with prices spanning $104.61 to $2,441 depending on wear, variant, and seller.