diff --git a/sql/delta_gun_code.sql b/sql/delta_gun_code.sql
index b46a762..41f9edd 100644
--- a/sql/delta_gun_code.sql
+++ b/sql/delta_gun_code.sql
@@ -54,3 +54,23 @@ WHERE r.`del_flag` = 0
     SELECT 1 FROM `t_sys_role_permission` rp
     WHERE rp.`role_id` = r.`id` AND rp.`permission_id` = p.`id`
   );
+
+-- 5. 菜单权限：二级菜单「改枪码录入」
+SET @delta_parent_id = (SELECT `id` FROM `t_sys_permission` WHERE `permission_code` = 'delta' AND `del_flag` = 0 ORDER BY `id` LIMIT 1);
+
+INSERT INTO `t_sys_permission`
+  (`parent_id`, `permission_code`, `permission_name`, `permission_desc`, `level`, `icon`, `url`, `component`, `sort`, `create_by`, `create_date`, `del_flag`)
+SELECT @delta_parent_id, 'delta:gun-code-entry', '改枪码录入', '快速录入三角洲改枪码', 2, 'md-create', '/delta/gun-code-entry', '/delta/delta-gun-code-entry', 0, 'admin', NOW(), 0
+FROM DUAL
+WHERE NOT EXISTS (SELECT 1 FROM `t_sys_permission` WHERE `permission_code` = 'delta:gun-code-entry' AND `del_flag` = 0);
+
+-- 6. 角色授权：给所有现有角色挂上「改枪码录入」菜单（幂等）
+INSERT INTO `t_sys_role_permission` (`role_id`, `permission_id`, `create_by`, `create_date`)
+SELECT r.`id`, p.`id`, 'admin', NOW()
+FROM `t_sys_role` r
+JOIN `t_sys_permission` p ON p.`permission_code` = 'delta:gun-code-entry' AND p.`del_flag` = 0
+WHERE r.`del_flag` = 0
+  AND NOT EXISTS (
+    SELECT 1 FROM `t_sys_role_permission` rp
+    WHERE rp.`role_id` = r.`id` AND rp.`permission_id` = p.`id`
+  );