diff --git a/packages/craftcms-legacy/cp/src/js/Preview.js b/packages/craftcms-legacy/cp/src/js/Preview.js
index d0ca2b57a01..3dfe02c5d3a 100644
--- a/packages/craftcms-legacy/cp/src/js/Preview.js
+++ b/packages/craftcms-legacy/cp/src/js/Preview.js
@@ -335,26 +335,8 @@ Craft.Preview = Garnish.Base.extend(
 
       if (this.settings.standaloneMode) {
         if (data.actionMenu) {
-          const labelId = Craft.namespaceId(
-            'action-menu-label',
-            this.namespace
-          );
-          const menuId = Craft.namespaceId('action-menu', this.namespace);
-          $('<label/>', {
-            id: labelId,
-            class: 'visually-hidden',
-            text: Craft.t('app', 'Actions'),
-          }).appendTo(this.$editorHeader);
-          const $actionBtn = $('<button/>', {
-            class: 'btn action-btn header-btn',
-            type: 'button',
-            title: Craft.t('app', 'Actions'),
-            'aria-controls': menuId,
-            'aria-describedby': labelId,
-            'data-disclosure-trigger': 'true',
-          }).appendTo(this.$editorHeader);
+          // A `<craft-action-menu>`, which brings its own invoker
           $(data.actionMenu).appendTo(this.$editorHeader);
-          $actionBtn.disclosureMenu();
         }
 
         if (data.editUrl) {
diff --git a/resources/js/modules/slideout/cp-screen-slideout.ts b/resources/js/modules/slideout/cp-screen-slideout.ts
index 1fbd150f364..e7987cd02de 100644
--- a/resources/js/modules/slideout/cp-screen-slideout.ts
+++ b/resources/js/modules/slideout/cp-screen-slideout.ts
@@ -426,10 +426,7 @@ export class CpScreenSlideout extends Slideout {
 
       this.unmountInertiaApp();
       this.$content.html(data.content);
-      if (this.$actionBtn) {
-        this.$actionBtn.data('disclosureMenu')?.destroy();
-        this.$actionBtn.remove();
-      }
+      this.$actionBtn?.remove();
 
       if (data.submitButtonLabel) {
         this.$saveBtn.find('.label').text(data.submitButtonLabel);
@@ -450,27 +447,10 @@ export class CpScreenSlideout extends Slideout {
         this.hasCpLink = false;
       }
 
-      if (data.actionMenu) {
-        const labelId = Craft.namespaceId('action-menu-label', this.namespace);
-        const menuId = Craft.namespaceId('action-menu', this.namespace);
-        $('<label/>', {
-          id: labelId,
-          class: 'visually-hidden',
-          text: Craft.t('app', 'Actions'),
-        }).insertBefore(this.$editLink);
-        this.$actionBtn = $('<button/>', {
-          class: 'btn action-btn header-btn',
-          type: 'button',
-          title: Craft.t('app', 'Actions'),
-          'aria-controls': menuId,
-          'aria-describedby': labelId,
-          'data-disclosure-trigger': 'true',
-        }).insertBefore(this.$editLink);
-        $(data.actionMenu).insertBefore(this.$editLink);
-        this.$actionBtn.disclosureMenu();
-      } else {
-        this.$actionBtn = null;
-      }
+      // A `<craft-action-menu>`, which brings its own invoker
+      this.$actionBtn = data.actionMenu
+        ? $(data.actionMenu).insertBefore(this.$editLink)
+        : null;
 
       if (data.sidebar) {
         this.$sidebarBtn.removeClass('hidden');
diff --git a/src/Http/Responses/CpScreenResponse.php b/src/Http/Responses/CpScreenResponse.php
index c679a178aad..79ea6abfd39 100644
--- a/src/Http/Responses/CpScreenResponse.php
+++ b/src/Http/Responses/CpScreenResponse.php
@@ -5,6 +5,7 @@
 namespace CraftCms\Cms\Http\Responses;
 
 use CraftCms\Cms\Cms;
+use CraftCms\Cms\Cp\Components\ActionMenu;
 use CraftCms\Cms\Cp\Data\ActionItem;
 use CraftCms\Cms\Cp\Data\NavItem;
 use CraftCms\Cms\Cp\Html\MenuHtml;
@@ -853,9 +854,7 @@ private function prepareSlideout(Request $request): array
                 : $this->inertiaProps,
             'sidebar' => $sidebar,
             'errorSummary' => $errorSummary,
-            'actionMenu' => $this->actionMenu(withDestructive: false, config: [
-                'withButton' => false,
-            ], namespace: $namespace),
+            'actionMenu' => $this->actionMenu(withDestructive: false, namespace: $namespace),
         ];
     }
 
@@ -1082,8 +1081,13 @@ private function contextMenu(?string $namespace = null): ?string
         ], $namespace);
     }
 
-    /** @param array<string, mixed> $config */
-    private function actionMenu(bool $withDestructive = true, array $config = [], ?string $namespace = null): ?string
+    /**
+     * Renders the slideout's action menu as a `<craft-action-menu>`.
+     *
+     * Item collection happens inside the namespace closure, along with rendering, so JS that items register against
+     * their IDs gets the same namespaced IDs as the rendered markup.
+     */
+    private function actionMenu(bool $withDestructive = true, ?string $namespace = null): ?string
     {
         $itemsFactory = $this->actionMenuItemsFactory($withDestructive);
 
@@ -1091,9 +1095,24 @@ private function actionMenu(bool $withDestructive = true, array $config = [], ?s
             return null;
         }
 
-        return $this->menu($itemsFactory, $config + [
-            'id' => 'action-menu',
-        ], $namespace);
+        $render = function () use ($itemsFactory): ?string {
+            $items = $this->menuItems($itemsFactory);
+
+            if (empty($items)) {
+                return null;
+            }
+
+            return ActionMenu::make()
+                ->menuItems($items, normalize: false)
+                ->label(t('Actions'))
+                ->toHtml();
+        };
+
+        if ($namespace) {
+            return InputNamespace::namespaceInputs($render, $namespace);
+        }
+
+        return $render();
     }
 
     /** @return list<array<string, mixed>>|null */
diff --git a/tests/Feature/Http/Responses/CpScreenSlideoutTest.php b/tests/Feature/Http/Responses/CpScreenSlideoutTest.php
index 6d8160cc8ca..d00d49dc509 100644
--- a/tests/Feature/Http/Responses/CpScreenSlideoutTest.php
+++ b/tests/Feature/Http/Responses/CpScreenSlideoutTest.php
@@ -6,6 +6,7 @@
 use CraftCms\Cms\Http\Controllers\Settings\EntryTypesController;
 use CraftCms\Cms\Http\Responses\CpScreenResponse;
 use CraftCms\Cms\Support\Facades\HtmlStack;
+use CraftCms\Cms\Support\Facades\InputNamespace;
 use CraftCms\Cms\Support\Str;
 use CraftCms\Cms\User\Elements\User;
 use Illuminate\Http\Request;
@@ -120,6 +121,28 @@ function slideoutResponse(): TestResponse
     ]);
 });
 
+it('renders the legacy slideout action menu as a craft-action-menu', function () {
+    $screen = new CpScreenResponse;
+    $screen->actionMenuItems(function () {
+        $id = InputNamespace::namespaceId('action-test');
+        HtmlStack::js("document.getElementById('$id').onclick = () => {};");
+
+        return [['id' => 'action-test', 'label' => 'Test action']];
+    });
+    $request = Request::create('/', server: [
+        'HTTP_ACCEPT' => 'application/json',
+        'HTTP_X_CRAFT_CONTAINER_ID' => 'slideout-1',
+    ]);
+
+    $data = $screen->toResponse($request)->getData(true);
+    $id = "{$data['namespace']}-action-test";
+
+    expect($data['actionMenu'])->toStartWith('<craft-action-menu')
+        ->not->toContain('menu--disclosure')
+        ->toContain('id="'.$id.'"')
+        ->and($data['bodyHtml'])->toContain($id);
+});
+
 it('gives each slideout its own input namespace', function () {
     $namespaceFor = fn (string $containerId) => withHeaders([
         'X-Craft-Container-Id' => $containerId,
diff --git a/yii2-adapter/legacy/web/CpScreenResponseFormatter.php b/yii2-adapter/legacy/web/CpScreenResponseFormatter.php
index 11ee2ae725c..c50f1fd1c28 100644
--- a/yii2-adapter/legacy/web/CpScreenResponseFormatter.php
+++ b/yii2-adapter/legacy/web/CpScreenResponseFormatter.php
@@ -8,6 +8,7 @@
 namespace craft\web;
 
 use Craft;
+use CraftCms\Cms\Cp\Components\ActionMenu;
 use CraftCms\Cms\Cp\Html\MenuHtml;
 use CraftCms\Cms\Cp\Icons;
 use CraftCms\Cms\Support\Facades\DeltaRegistry;
@@ -111,9 +112,7 @@ private function _formatJson(Request $request, YiiResponse $response, CpScreenRe
             'action' => $behavior->action,
             'extraToolbarItems' => $extraToolbarItems,
             'submitButtonLabel' => $behavior->submitButtonLabel,
-            'actionMenu' => $this->_actionMenu($behavior, false, [
-                'withButton' => false,
-            ], $namespace),
+            'actionMenu' => $this->_slideoutActionMenu($behavior, $namespace),
             'content' => $content,
             'sidebar' => $sidebar,
             'errorSummary' => $errorSummary,
@@ -258,6 +257,38 @@ private function _actionMenu(
         ], $namespace);
     }
 
+    /**
+     * Renders a slideout's action menu as a `<craft-action-menu>`.
+     */
+    private function _slideoutActionMenu(CpScreenResponseBehavior $behavior, ?string $namespace): ?string
+    {
+        if ($behavior->actionMenuItems === null) {
+            return null;
+        }
+
+        $render = function() use ($behavior): ?string {
+            $items = array_filter(
+                app(MenuHtml::class)->normalizeMenuItems(call_user_func($behavior->actionMenuItems) ?? []),
+                fn(array $item) => !($item['destructive'] ?? false),
+            );
+
+            if (empty($items)) {
+                return null;
+            }
+
+            return ActionMenu::make()
+                ->menuItems(array_values($items))
+                ->label(t('Actions'))
+                ->toHtml();
+        };
+
+        if ($namespace) {
+            return InputNamespace::namespaceInputs($render, $namespace);
+        }
+
+        return $render();
+    }
+
     private function _menu(?callable $itemsFactory, array $config, ?string $namespace): ?string
     {
         if ($itemsFactory === null) {