diff --git a/nms/all/pom.xml b/nms/all/pom.xml
index 2bfd344..8766b63 100644
--- a/nms/all/pom.xml
+++ b/nms/all/pom.xml
@@ -10,7 +10,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>shopchest-nms-all</artifactId>
-    <version>1.0.3</version>
+    <version>1.0.4</version>
 
     <packaging>pom</packaging>
 
@@ -72,6 +72,10 @@
             <groupId>de.epiceric</groupId>
             <artifactId>shopchest-nms-v1_20_R4</artifactId>
         </dependency>
+        <dependency>
+            <groupId>de.epiceric</groupId>
+            <artifactId>shopchest-nms-v1_21_R1</artifactId>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/nms/pom.xml b/nms/pom.xml
index 21d6160..d0a8752 100644
--- a/nms/pom.xml
+++ b/nms/pom.xml
@@ -27,6 +27,7 @@
         <module>v1_20_R2</module>
         <module>v1_20_R3</module>
         <module>v1_20_R4</module>
+        <module>v1_21_R1</module>
         <module>all</module>
     </modules>
 
@@ -118,6 +119,12 @@
                 <version>1.0.0</version>
                 <scope>provided</scope>
             </dependency>
+            <dependency>
+                <groupId>de.epiceric</groupId>
+                <artifactId>shopchest-nms-v1_21_R1</artifactId>
+                <version>1.0.0</version>
+                <scope>provided</scope>
+            </dependency>
         </dependencies>
     </dependencyManagement>
 
diff --git a/nms/v1_21_R1/pom.xml b/nms/v1_21_R1/pom.xml
new file mode 100644
index 0000000..59643c0
--- /dev/null
+++ b/nms/v1_21_R1/pom.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>shopchest-nms</artifactId>
+        <groupId>de.epiceric</groupId>
+        <version>1.0.1</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>shopchest-nms-v1_21_R1</artifactId>
+    <version>1.0.0</version>
+
+    <properties>
+        <spigot.version>1.21-R0.1-SNAPSHOT</spigot.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot</artifactId>
+            <classifier>remapped-mojang</classifier>
+        </dependency>
+        <dependency>
+            <groupId>de.epiceric</groupId>
+            <artifactId>shopchest-nms-interface</artifactId>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>net.md-5</groupId>
+                <artifactId>specialsource-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeArmorStandImpl.java b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeArmorStandImpl.java
new file mode 100644
index 0000000..549936c
--- /dev/null
+++ b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeArmorStandImpl.java
@@ -0,0 +1,94 @@
+package de.epiceric.shopchest.nms.v1_21_R1;
+
+import de.epiceric.shopchest.nms.FakeArmorStand;
+import io.netty.buffer.Unpooled;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.decoration.ArmorStand;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.v1_21_R1.util.CraftChatMessage;
+import org.bukkit.entity.Player;
+
+import java.lang.reflect.Field;
+import java.util.List;
+import java.util.Optional;
+
+public class FakeArmorStandImpl extends FakeEntityImpl<String> implements FakeArmorStand {
+
+    private final static byte INVISIBLE_FLAG = 0b100000;
+    private final static byte MARKER_FLAG = 0b10000;
+    private final static EntityDataAccessor<Byte> DATA_SHARED_FLAGS_ID;
+    private final static EntityDataAccessor<Optional<Component>> DATA_CUSTOM_NAME;
+    private final static EntityDataAccessor<Boolean> DATA_CUSTOM_NAME_VISIBLE;
+    private final static float MARKER_ARMOR_STAND_OFFSET = 1.975f;
+
+    static {
+        try {
+            final Field dataSharedFlagsId = Entity.class.getDeclaredField(ObfuscatedFieldNames.DATA_SHARED_FLAGS_ID);
+            dataSharedFlagsId.setAccessible(true);
+            DATA_SHARED_FLAGS_ID = forceCast(dataSharedFlagsId.get(null));
+            final Field dataCustomNameField = Entity.class.getDeclaredField(ObfuscatedFieldNames.DATA_CUSTOM_NAME);
+            dataCustomNameField.setAccessible(true);
+            DATA_CUSTOM_NAME = forceCast(dataCustomNameField.get(null));
+            final Field dataCustomNameVisibleField = Entity.class.getDeclaredField(ObfuscatedFieldNames.DATA_CUSTOM_NAME_VISIBLE);
+            dataCustomNameVisibleField.setAccessible(true);
+            DATA_CUSTOM_NAME_VISIBLE = forceCast(dataCustomNameVisibleField.get(null));
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public FakeArmorStandImpl() {
+        super();
+    }
+
+    @Override
+    public void sendData(String name, Iterable<Player> receivers) {
+        sendData(receivers, name);
+    }
+
+    @Override
+    protected EntityType<?> getEntityType() {
+        return EntityType.ARMOR_STAND;
+    }
+
+    @Override
+    protected float getSpawnOffSet() {
+        return MARKER_ARMOR_STAND_OFFSET;
+    }
+
+    @Override
+    protected int getDataItemCount() {
+        return 4;
+    }
+
+    @Override
+    protected void addSpecificData(List<SynchedEntityData.DataValue<?>> packedItems, String name) {
+        packedItems.add(SynchedEntityData.DataValue.create(DATA_SHARED_FLAGS_ID, INVISIBLE_FLAG));
+        packedItems.add(SynchedEntityData.DataValue.create(DATA_CUSTOM_NAME, Optional.ofNullable(
+                CraftChatMessage.fromStringOrNull(name)
+        )));
+        packedItems.add(SynchedEntityData.DataValue.create(DATA_CUSTOM_NAME_VISIBLE, true));
+        packedItems.add(SynchedEntityData.DataValue.create(ArmorStand.DATA_CLIENT_FLAGS, MARKER_FLAG));
+    }
+
+    @Override
+    public void setLocation(Location location, Iterable<Player> receivers) {
+        final FriendlyByteBuf buffer = new FriendlyByteBuf(Unpooled.buffer());
+        buffer.writeVarInt(entityId);
+        buffer.writeDouble(location.getX());
+        buffer.writeDouble(location.getY() + MARKER_ARMOR_STAND_OFFSET);
+        buffer.writeDouble(location.getZ());
+        buffer.writeByte(0);
+        buffer.writeByte(0);
+        buffer.writeBoolean(false);
+        final ClientboundTeleportEntityPacket positionPacket = ClientboundTeleportEntityPacket.STREAM_CODEC.decode(buffer);
+        sendPacket(positionPacket, receivers);
+    }
+
+}
diff --git a/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeEntityImpl.java b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeEntityImpl.java
new file mode 100644
index 0000000..b6ee555
--- /dev/null
+++ b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeEntityImpl.java
@@ -0,0 +1,115 @@
+package de.epiceric.shopchest.nms.v1_21_R1;
+
+import de.epiceric.shopchest.nms.FakeEntity;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientboundAddEntityPacket;
+import net.minecraft.network.protocol.game.ClientboundRemoveEntitiesPacket;
+import net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.phys.Vec3;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.v1_21_R1.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+
+import java.lang.reflect.Field;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public abstract class FakeEntityImpl<T> implements FakeEntity {
+
+    private final static AtomicInteger ENTITY_COUNTER;
+    private final static EntityDataAccessor<Boolean> DATA_NO_GRAVITY;
+    private final static EntityDataAccessor<Boolean> DATA_SILENT;
+
+    static {
+        try {
+            final Field entityCounterField = Entity.class.getDeclaredField(ObfuscatedFieldNames.ENTITY_COUNTER);
+            entityCounterField.setAccessible(true);
+            ENTITY_COUNTER = (AtomicInteger) entityCounterField.get(null);
+            final Field dataNoGravityField = Entity.class.getDeclaredField(ObfuscatedFieldNames.DATA_NO_GRAVITY);
+            dataNoGravityField.setAccessible(true);
+            DATA_NO_GRAVITY = forceCast(dataNoGravityField.get(null));
+            final Field dataSilentField = Entity.class.getDeclaredField(ObfuscatedFieldNames.DATA_SILENT);
+            dataSilentField.setAccessible(true);
+            DATA_SILENT = forceCast(dataSilentField.get(null));
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    protected final int entityId;
+
+    public FakeEntityImpl() {
+        entityId = ENTITY_COUNTER.incrementAndGet();
+    }
+
+    @SuppressWarnings("unchecked")
+    protected static <T> T forceCast(Object o) {
+        return (T) o;
+    }
+
+    @Override
+    public int getEntityId() {
+        return entityId;
+    }
+
+    protected void sendPacket(Packet<?> packet, Iterable<Player> receivers) {
+        for (Player receiver : receivers) {
+            ((CraftPlayer) receiver).getHandle().connection.send(packet);
+        }
+    }
+
+    @Override
+    public void spawn(UUID uuid, Location location, Iterable<Player> receivers) {
+        final ClientboundAddEntityPacket spawnPacket = new ClientboundAddEntityPacket(
+                entityId,
+                uuid,
+                location.getX(),
+                location.getY() + getSpawnOffSet(),
+                location.getZ(),
+                0f,
+                0f,
+                getEntityType(),
+                0,
+                Vec3.ZERO,
+                0d
+        );
+        sendPacket(spawnPacket, receivers);
+    }
+
+    @Override
+    public void remove(Iterable<Player> receivers) {
+        final ClientboundRemoveEntitiesPacket removePacket = new ClientboundRemoveEntitiesPacket(entityId);
+        sendPacket(removePacket, receivers);
+    }
+
+    protected void sendData(Iterable<Player> receivers, T data) {
+        // Create packet
+        final List<SynchedEntityData.DataValue<?>> packedItems = new LinkedList<>();
+        final ClientboundSetEntityDataPacket dataPacket = new ClientboundSetEntityDataPacket(entityId, packedItems);
+
+        // Setup data
+        packedItems.add(SynchedEntityData.DataValue.create(DATA_NO_GRAVITY, true));
+        packedItems.add(SynchedEntityData.DataValue.create(DATA_SILENT, true));
+        addSpecificData(packedItems, data);
+
+        // Send packet
+        sendPacket(dataPacket, receivers);
+    }
+
+    protected abstract EntityType<?> getEntityType();
+
+    protected float getSpawnOffSet() {
+        return 0f;
+    }
+
+    protected abstract int getDataItemCount();
+
+    protected abstract void addSpecificData(List<SynchedEntityData.DataValue<?>> packedItems, T data);
+
+}
diff --git a/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeItemImpl.java b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeItemImpl.java
new file mode 100644
index 0000000..2ee22f3
--- /dev/null
+++ b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/FakeItemImpl.java
@@ -0,0 +1,60 @@
+package de.epiceric.shopchest.nms.v1_21_R1;
+
+import de.epiceric.shopchest.nms.FakeItem;
+import net.minecraft.network.protocol.game.ClientboundSetEntityMotionPacket;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.item.ItemEntity;
+import net.minecraft.world.phys.Vec3;
+import org.bukkit.craftbukkit.v1_21_R1.inventory.CraftItemStack;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+
+import java.lang.reflect.Field;
+import java.util.List;
+
+public class FakeItemImpl extends FakeEntityImpl<ItemStack> implements FakeItem {
+
+    private final static EntityDataAccessor<net.minecraft.world.item.ItemStack> DATA_ITEM;
+
+    static {
+        try {
+            final Field dataItemField = ItemEntity.class.getDeclaredField(ObfuscatedFieldNames.DATA_ITEM);
+            dataItemField.setAccessible(true);
+            DATA_ITEM = forceCast(dataItemField.get(null));
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public FakeItemImpl() {
+        super();
+    }
+
+    @Override
+    public void sendData(ItemStack item, Iterable<Player> receivers) {
+        sendData(receivers, item);
+    }
+
+    @Override
+    public void resetVelocity(Iterable<Player> receivers) {
+        final ClientboundSetEntityMotionPacket velocityPacket = new ClientboundSetEntityMotionPacket(entityId, Vec3.ZERO);
+        sendPacket(velocityPacket, receivers);
+    }
+
+    @Override
+    protected EntityType<?> getEntityType() {
+        return EntityType.ITEM;
+    }
+
+    @Override
+    protected int getDataItemCount() {
+        return 1;
+    }
+
+    @Override
+    protected void addSpecificData(List<SynchedEntityData.DataValue<?>> packedItems, ItemStack data) {
+        packedItems.add(SynchedEntityData.DataValue.create(DATA_ITEM, CraftItemStack.asNMSCopy(data)));
+    }
+}
diff --git a/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/ObfuscatedFieldNames.java b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/ObfuscatedFieldNames.java
new file mode 100644
index 0000000..31afadc
--- /dev/null
+++ b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/ObfuscatedFieldNames.java
@@ -0,0 +1,15 @@
+package de.epiceric.shopchest.nms.v1_21_R1;
+
+public class ObfuscatedFieldNames {
+
+    // Entity
+    public static final String ENTITY_COUNTER = "c";
+    public static final String DATA_NO_GRAVITY = "aT";
+    public static final String DATA_SILENT = "aS";
+    public static final String DATA_SHARED_FLAGS_ID = "ap";
+    public static final String DATA_CUSTOM_NAME = "aQ";
+    public static final String DATA_CUSTOM_NAME_VISIBLE = "aR";
+    // ItemEntity
+    public static final String DATA_ITEM = "d";
+
+}
diff --git a/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/PlatformImpl.java b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/PlatformImpl.java
new file mode 100644
index 0000000..9f01e5b
--- /dev/null
+++ b/nms/v1_21_R1/src/main/java/de/epiceric/shopchest/nms/v1_21_R1/PlatformImpl.java
@@ -0,0 +1,19 @@
+package de.epiceric.shopchest.nms.v1_21_R1;
+
+import de.epiceric.shopchest.nms.FakeArmorStand;
+import de.epiceric.shopchest.nms.FakeItem;
+import de.epiceric.shopchest.nms.Platform;
+
+public class PlatformImpl implements Platform {
+
+    @Override
+    public FakeArmorStand createFakeArmorStand() {
+        return new FakeArmorStandImpl();
+    }
+
+    @Override
+    public FakeItem createFakeItem() {
+        return new FakeItemImpl();
+    }
+
+}
diff --git a/plugin/src/main/java/de/epiceric/shopchest/nms/PlatformLoader.java b/plugin/src/main/java/de/epiceric/shopchest/nms/PlatformLoader.java
index f438c2c..3398a3c 100644
--- a/plugin/src/main/java/de/epiceric/shopchest/nms/PlatformLoader.java
+++ b/plugin/src/main/java/de/epiceric/shopchest/nms/PlatformLoader.java
@@ -100,6 +100,8 @@ public class PlatformLoader {
             case "ad1a88fd7eaf2277f2507bf34d7b994c": // 1.20.5 (Replaced by 1.20.6)
             case "ee13f98a43b9c5abffdcc0bb24154460": // 1.20.6 (v1_20_R4)
                 return new de.epiceric.shopchest.nms.v1_20_R4.PlatformImpl();
+            case "229d7afc75b70a6c388337687ac4da1f": // 1.21 (v1_21_R1)
+                return new de.epiceric.shopchest.nms.v1_21_R1.PlatformImpl();
             default:
                 return null;
         }
diff --git a/pom.xml b/pom.xml
index 01ca1f0..d87119f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -317,7 +317,7 @@
             <dependency>
                 <groupId>de.epiceric</groupId>
                 <artifactId>shopchest-nms-all</artifactId>
-                <version>1.0.3</version>
+                <version>1.0.4</version>
                 <classifier>${nms-classifier}</classifier>
             </dependency>
             <dependency>