Master Guide to M9 Bayonet Doppler Phase 4 Max Blue Tip & BTA Blue Patterns

The blade of the knife and the guard are painted with metallic paints and adorned with a pattern of translucent wavy lines resembling smoke. The color scheme of the skin includes various shades of blue, brown and black creating gradient transitions. The handle remains unpainted.
The pattern index affects the ratio of colors as well as the location of blue, brown and black areas. Pattern variations with a predominance of blue on the play side of the blade are titled "BTA Blue". Knives with only blue color on the blade resemble M9 Bayonet | Doppler Sapphire and are titled Max Blue.
The Tier 1 pattern has more blue on the blade tip. As the knife grades down, the "Max Blue" pattern moves to the left side of the blade. The Tier 1 knife has less black on the blade than the Tier 4. The best Tier 1 patterns are 763 and 575.

Best blue coverage with clean tip.

More black areas, blue shifted left.

Mixed colors, less valuable.
47 patterns - Best blue tip coverage

Tier 1 patterns feature the best blue coverage with clean blue extending to the knife tip. These elite Max Blue patterns resemble Doppler Sapphire with exceptional blue dominance and minimal black interference. Patterns #763 and #575 are considered the absolute best.
53 patterns - Excellent blue coverage

Tier 2 patterns offer excellent blue coverage with good tip visibility. These premium Max Blue patterns provide great value while maintaining strong Sapphire-like characteristics across the blade.
56 patterns - Good blue coverage

Tier 3 patterns provide good blue coverage with some black areas. These quality Max Blue patterns offer solid value for collectors seeking blue dominance at competitive prices.
58 patterns - Affordable Max Blue

Tier 4 patterns provide entry-level access to Max Blue status at the most affordable prices. The blue pattern moves more to the left side of the blade with increased black areas compared to higher tiers.
35 patterns - Additional Max Blue options
Other BTA Patterns - these patterns come after Tier 4 and are also Max Blue patterns. They offer additional options for collectors seeking Sapphire-like appearance at various price points.
Float Value of the skin ranges from 0.00 to 0.08, which makes M9 Bayonet Doppler Phase 4 available only in Factory New and Minimal Wear condition. At levels of wear close to the maximum, the knife has noticeable scratches and abrasions located on the spine and around the hole.

Perfect condition with no visible scratches or wear marks.

Slight wear with minimal scratches visible on edges and around the hole.
Little abrasions are also present on other edges of the blade at higher float values. The spine and hole area show the most visible wear patterns.
Max Blue patterns resemble Doppler Sapphire with only blue color on the blade, making them highly valuable.
Patterns #763 and #575 are considered the best Tier 1 patterns with optimal blue tip coverage.
As tiers decrease, blue patterns shift left and black areas increase on the blade surface.
Float range is limited to 0.00-0.08, making only Factory New and Minimal Wear available.
Other BTA patterns provide additional Max Blue options beyond the main tier classifications.
Browse available M9 Bayonet Doppler Phase 4 skins and find your Max Blue pattern
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