M9 Bayonet | Stained

Origin Story

The M9 Bayonet | Stained debuted on August 14, 2013, as part of The Arms Deal update, introducing one of the original knife finishes to the game. Its visual identity centers on a forced patina, achieved by dripping lemon and mustard onto the surface, resulting in a weathered, tarnished metal appearance. This finish is generally regarded as a lower-profile, budget M9 option, favored by players seeking the M9 silhouette without the premium cost of more elaborate patterns. It is visually grouped with other realistic metal knife skins, offering a utilitarian, worn steel look that contrasts with brighter finishes. The design leans into a grungy, dirty-metal aesthetic, reinforced by flavor text that suggests its messiness is even more pronounced under a blacklight.

Drop Chance

M9 Bayonet | Stained is a knife-tier skin, so standard Valve rarity odds don't apply. Knives drop at a combined rate of approximately 0.26% from supported cases before accounting for which knife type and finish you get. Valve doesn't publish individual knife or phase probabilities.

Skin Condition

Float range 0 to 1. Exteriors: Factory New, Minimal Wear, Field-Tested, Well-Worn, Battle-Scarred. StatTrak is available in FN, MW, FT, WW, BS.

• Factory New (No Recent Price): The blade shows a relatively clean, bright steel with controlled patina blotches, appearing crisp and intact.
• Minimal Wear ($757.00): Visually very close to Factory New, with a slightly darker tint and a few more micro-scratches on high-contact edges, often considered a better value.
• Field-Tested ($630.00): The patina becomes noticeably darker and more uneven, with additional wear spotting along the cutting edge and spine, giving a more heavily used appearance.
• Well-Worn ($616.83): The blade appears duller and more blotchy, with extended dark areas and wear marks, further reducing shine and increasing the beat-up impression.
• Battle-Scarred ($598.03): The patina effect is at its heaviest, resulting in a very dark, heavily used blade with strong blotching and a rough, grimy appearance.

Model

Stained uses the legacy M9 Bayonet model, introduced with The Arms Deal on August 14, 2013. The inspect animation and third-person appearance match the original CS:GO version.

How to Obtain

The M9 Bayonet | Stained is obtained as a rare special item from the CS:GO Weapon Case, CS:GO Weapon Case 2, and CS:GO Weapon Case 3. These cases are part of the rare case drop pool, meaning new knives enter the game infrequently. A StatTrak version is also available for kill tracking.

Price Range

M9 Bayonet | Stained ranges from $598.03 (Battle-Scarred) to No Recent Price (Factory New). Field-Tested copies sit at $630.00. StatTrak versions carry a premium at every wear tier.


The current 7-day median is No Recent Price. The 90-day median is $551.81. The all-time median is $139.06. Volume averages 0 trades per day.

Visual Theme

Patina: It has been given a forced patina using lemon and mustard dripped onto the surface. The dominant colors are muted silver, gray, and brownish tarnish tones, giving it a weathered metal appearance rather than painted color. In first-person view, the long, stained blade surface with blotchy patina patches is the most visible element. The community visually groups Stained with other realistic metal knife skins like Boreal Forest, Rust Coat, and Safari Mesh, often describing it as less flashy and more utilitarian than brighter finishes.

Player Rating

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Sticker Compatibility

Stickers placed on the handle and guard area are partially visible in first-person view, offering opportunities for customization. Given the muted metal and gray-brown palette of the Stained finish, stickers with white, silver, or gray logos can blend seamlessly. Alternatively, dark blue, navy, or black stickers can maintain a subdued, tactical aesthetic, while gold or yellow can provide a contrasting highlight against the tarnished steel.