diff --git a/patches/api/0495-DataComponent-API.patch b/patches/api/0495-DataComponent-API.patch
index 550b81d926..7b2b1bc9e4 100644
--- a/patches/api/0495-DataComponent-API.patch
+++ b/patches/api/0495-DataComponent-API.patch
@@ -853,13 +853,15 @@ index 0000000000000000000000000000000000000000..8c88bbbeef179e6c6666d07c8b28157e
 +}
 diff --git a/src/main/java/io/papermc/paper/datacomponent/item/CustomModelData.java b/src/main/java/io/papermc/paper/datacomponent/item/CustomModelData.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..31921e8d94ea117dce298fd97e95ad9608158a1d
+index 0000000000000000000000000000000000000000..734b1750a00f711a57186f15285cfc4c2563b1a2
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/datacomponent/item/CustomModelData.java
-@@ -0,0 +1,51 @@
+@@ -0,0 +1,144 @@
 +package io.papermc.paper.datacomponent.item;
 +
 +import java.util.List;
++import io.papermc.paper.datacomponent.DataComponentBuilder;
++import org.bukkit.Color;
 +import org.jetbrains.annotations.ApiStatus;
 +import org.jetbrains.annotations.Contract;
 +import org.jspecify.annotations.NullMarked;
@@ -874,7 +876,10 @@ index 0000000000000000000000000000000000000000..31921e8d94ea117dce298fd97e95ad96
 +@ApiStatus.NonExtendable
 +public interface CustomModelData {
 +
-+    // TODO
++    @Contract(value = "-> new", pure = true)
++    static CustomModelData.Builder customModelData() {
++        return ItemComponentTypesBridge.bridge().customModelData();
++    }
 +
 +    /**
 +     * Gets the custom model data float values.
@@ -906,7 +911,95 @@ index 0000000000000000000000000000000000000000..31921e8d94ea117dce298fd97e95ad96
 +     * @return the color values
 +     */
 +    @Contract(pure = true)
-+    List<Integer> colors();
++    List<Color> colors();
++
++    /**
++     * Builder for {@link CustomModelData}.
++     */
++    @ApiStatus.Experimental
++    @ApiStatus.NonExtendable
++    interface Builder extends DataComponentBuilder<CustomModelData> {
++
++        /**
++         * Adds a float to this custom model data.
++         *
++         * @param num the float
++         * @return the builder for chaining
++         * @see #floats()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addFloat(float num);
++
++        /**
++         * Adds multiple floats to this custom model data.
++         *
++         * @param nums the floats
++         * @return the builder for chaining
++         * @see #floats()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addFloats(List<Float> nums);
++
++        /**
++         * Adds a flag to this custom model data.
++         *
++         * @param flag the flag
++         * @return the builder for chaining
++         * @see #floats()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addFlag(boolean flag);
++
++        /**
++         * Adds multiple flags to this custom model data.
++         *
++         * @param flags the flags
++         * @return the builder for chaining
++         * @see #flags()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addFlags(List<Boolean> flags);
++
++        /**
++         * Adds a string to this custom model data.
++         *
++         * @param string the string
++         * @return the builder for chaining
++         * @see #strings()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addString(String string);
++
++        /**
++         * Adds multiple strings to this custom model data.
++         *
++         * @param strings the strings
++         * @return the builder for chaining
++         * @see #strings()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addStrings(List<String> strings);
++
++        /**
++         * Adds a color to this custom model data.
++         *
++         * @param color the float
++         * @return the builder for chaining
++         * @see #colors()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addColor(Color color);
++
++        /**
++         * Adds multiple colors to this custom model data.
++         *
++         * @param colors the colors
++         * @return the builder for chaining
++         * @see #colors()
++         */
++        @Contract(value = "_ -> this", mutates = "this")
++        CustomModelData.Builder addColors(List<Color> colors);
++    }
 +}
 diff --git a/src/main/java/io/papermc/paper/datacomponent/item/DamageResistant.java b/src/main/java/io/papermc/paper/datacomponent/item/DamageResistant.java
 new file mode 100644
@@ -1684,7 +1777,7 @@ index 0000000000000000000000000000000000000000..56a3e678c6658dd617da4974d9392006
 +}
 diff --git a/src/main/java/io/papermc/paper/datacomponent/item/ItemComponentTypesBridge.java b/src/main/java/io/papermc/paper/datacomponent/item/ItemComponentTypesBridge.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..1ce34642371a65590ce1ac74b402ccfc301671d7
+index 0000000000000000000000000000000000000000..12df050d35a8470d9a111c98d9c0e22a52b684d1
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/datacomponent/item/ItemComponentTypesBridge.java
 @@ -0,0 +1,112 @@
@@ -1778,7 +1871,7 @@ index 0000000000000000000000000000000000000000..1ce34642371a65590ce1ac74b402ccfc
 +
 +    ItemAdventurePredicate.Builder itemAdventurePredicate();
 +
-+    CustomModelData customModelData(int id);
++    CustomModelData.Builder customModelData();
 +
 +    MapId mapId(int id);
 +
diff --git a/patches/server/1031-DataComponent-API.patch b/patches/server/1031-DataComponent-API.patch
index 9f3257ced1..af60a90785 100644
--- a/patches/server/1031-DataComponent-API.patch
+++ b/patches/server/1031-DataComponent-API.patch
@@ -348,10 +348,10 @@ index 0000000000000000000000000000000000000000..e2fcf870b2256e3df90372c3208f3ed2
 +}
 diff --git a/src/main/java/io/papermc/paper/datacomponent/item/ItemComponentTypesBridgesImpl.java b/src/main/java/io/papermc/paper/datacomponent/item/ItemComponentTypesBridgesImpl.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..e015b9c1fc5414afe0e040438fd95ef082c69a30
+index 0000000000000000000000000000000000000000..15c66b0186ffede98a196f63e0e616b125bac35a
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/datacomponent/item/ItemComponentTypesBridgesImpl.java
-@@ -0,0 +1,240 @@
+@@ -0,0 +1,239 @@
 +package io.papermc.paper.datacomponent.item;
 +
 +import com.destroystokyo.paper.profile.PlayerProfile;
@@ -577,9 +577,8 @@ index 0000000000000000000000000000000000000000..e015b9c1fc5414afe0e040438fd95ef0
 +    }
 +
 +    @Override
-+    public CustomModelData customModelData(final int id) {
-+        throw new UnsupportedOperationException("Not implemented yet");
-+        //return new PaperCustomModelData(new net.minecraft.world.item.component.CustomModelData(id));
++    public CustomModelData.Builder customModelData() {
++        return new PaperCustomModelData.BuilderImpl();
 +    }
 +
 +    @Override
@@ -964,13 +963,17 @@ index 0000000000000000000000000000000000000000..0bc2bad71d6945ca24f37008effc903a
 +}
 diff --git a/src/main/java/io/papermc/paper/datacomponent/item/PaperCustomModelData.java b/src/main/java/io/papermc/paper/datacomponent/item/PaperCustomModelData.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..f361f026acba97efb0482d4d792fefb33a4faf47
+index 0000000000000000000000000000000000000000..a47fe18c1b619df9ff3adacf5c7c670dece84179
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/datacomponent/item/PaperCustomModelData.java
-@@ -0,0 +1,34 @@
+@@ -0,0 +1,109 @@
 +package io.papermc.paper.datacomponent.item;
 +
++import java.util.ArrayList;
++import java.util.Collections;
 +import java.util.List;
++import io.papermc.paper.util.MCUtil;
++import org.bukkit.Color;
 +import org.bukkit.craftbukkit.util.Handleable;
 +
 +public record PaperCustomModelData(
@@ -984,22 +987,93 @@ index 0000000000000000000000000000000000000000..f361f026acba97efb0482d4d792fefb3
 +
 +    @Override
 +    public List<Float> floats() {
-+        return this.impl.floats();
++        return Collections.unmodifiableList(this.impl.floats());
 +    }
 +
 +    @Override
 +    public List<Boolean> flags() {
-+        return this.impl.flags();
++        return Collections.unmodifiableList(this.impl.flags());
 +    }
 +
 +    @Override
 +    public List<String> strings() {
-+        return this.impl.strings();
++        return Collections.unmodifiableList(this.impl.strings());
 +    }
 +
 +    @Override
-+    public List<Integer> colors() {
-+        return this.impl.colors();
++    public List<Color> colors() {
++        return MCUtil.transformUnmodifiable(this.impl.colors(), Color::fromRGB);
++    }
++
++    static final class BuilderImpl implements CustomModelData.Builder {
++
++        private final List<Float> floats = new ArrayList<>();
++        private final List<Boolean> flags = new ArrayList<>();
++        private final List<String> strings = new ArrayList<>();
++        private final List<Integer> colors = new ArrayList<>();
++
++        @Override
++        public Builder addFloat(final float num) {
++            this.floats.add(num);
++            return this;
++        }
++
++        @Override
++        public Builder addFloats(final List<Float> nums) {
++            this.floats.addAll(nums);
++            return this;
++        }
++
++        @Override
++        public Builder addFlag(final boolean flag) {
++            this.flags.add(flag);
++            return this;
++        }
++
++        @Override
++        public Builder addFlags(final List<Boolean> flags) {
++            this.flags.addAll(flags);
++            return this;
++        }
++
++        @Override
++        public Builder addString(final String string) {
++            this.strings.add(string);
++            return this;
++        }
++
++        @Override
++        public Builder addStrings(final List<String> strings) {
++            this.strings.addAll(strings);
++            return this;
++        }
++
++        @Override
++        public Builder addColor(final Color color) {
++            this.colors.add(color.asRGB());
++            return this;
++        }
++
++        @Override
++        public Builder addColors(final List<Color> colors) {
++            for (Color color : colors) {
++                this.addColor(color);
++            }
++            return this;
++        }
++
++        @Override
++        public CustomModelData build() {
++            return new PaperCustomModelData(
++                new net.minecraft.world.item.component.CustomModelData(
++                    this.floats,
++                    this.flags,
++                    this.strings,
++                    this.colors
++                )
++            );
++        }
++
 +    }
 +}
 diff --git a/src/main/java/io/papermc/paper/datacomponent/item/PaperDamageResistant.java b/src/main/java/io/papermc/paper/datacomponent/item/PaperDamageResistant.java
@@ -4090,10 +4164,10 @@ index 0000000000000000000000000000000000000000..4ee0491763341232844a99aa528310a3
 +}
 diff --git a/src/test/java/io/papermc/paper/item/ItemStackDataComponentTest.java b/src/test/java/io/papermc/paper/item/ItemStackDataComponentTest.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..d868505098533dc62436767416f1ece0f7067f57
+index 0000000000000000000000000000000000000000..00133403f878d238fba84743b2d76a16d7a5e32f
 --- /dev/null
 +++ b/src/test/java/io/papermc/paper/item/ItemStackDataComponentTest.java
-@@ -0,0 +1,417 @@
+@@ -0,0 +1,416 @@
 +package io.papermc.paper.item;
 +
 +import io.papermc.paper.datacomponent.DataComponentType;
@@ -4276,9 +4350,8 @@ index 0000000000000000000000000000000000000000..d868505098533dc62436767416f1ece0
 +    }
 +
 +    @Test
-+    void testCustomModelData() {
-+        // TODO
-+        //testWithMeta(new ItemStack(Material.STONE), DataComponentTypes.CUSTOM_MODEL_DATA, CustomModelData.customModelData(1), CustomModelData::id, ItemMeta.class, ItemMeta::getCustomModelData, ItemMeta::setCustomModelData);
++    void testLegacyCustomModelData() {
++        testWithMeta(new ItemStack(Material.STONE), DataComponentTypes.CUSTOM_MODEL_DATA, CustomModelData.customModelData().addFloat(1).build(), customModelData -> customModelData.floats().get(0).intValue(), ItemMeta.class, ItemMeta::getCustomModelData, ItemMeta::setCustomModelData);
 +    }
 +
 +    @Test