diff --git a/lib/hkStubs/CMakeLists.txt b/lib/hkStubs/CMakeLists.txt
index 06f6380f..62d5a7d9 100644
--- a/lib/hkStubs/CMakeLists.txt
+++ b/lib/hkStubs/CMakeLists.txt
@@ -5,6 +5,7 @@ add_library(hkStubs OBJECT
 
   Havok/Common/Base/Container/hkContainerAllocators.h
   Havok/Common/Base/Container/Array/hkArray.h
+  Havok/Common/Base/Container/Array/hkArrayUtil.h
   Havok/Common/Base/Container/String/hkStringPtr.h
 
   Havok/Common/Base/Math/hkMath.h
diff --git a/lib/hkStubs/Havok/Common/Base/Container/Array/hkArray.h b/lib/hkStubs/Havok/Common/Base/Container/Array/hkArray.h
index 8e7e9001..0c78dbe8 100644
--- a/lib/hkStubs/Havok/Common/Base/Container/Array/hkArray.h
+++ b/lib/hkStubs/Havok/Common/Base/Container/Array/hkArray.h
@@ -1,8 +1,10 @@
 #pragma once
 
+#include <Havok/Common/Base/Container/Array/hkArrayUtil.h>
 #include <Havok/Common/Base/Container/hkContainerAllocators.h>
 #include <Havok/Common/Base/Types/hkBaseDefs.h>
 #include <Havok/Common/Base/Types/hkBaseTypes.h>
+#include <type_traits>
 
 /// Base class for hkArray (a std::vector-like container).
 // FIXME: incomplete
@@ -18,6 +20,7 @@ public:
     };
 
     HK_FORCE_INLINE hkArrayBase();
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init)
     explicit hkArrayBase(hkFinishLoadedObjectFlag f) {}
 
     HK_FORCE_INLINE ~hkArrayBase();
@@ -25,6 +28,14 @@ public:
     hkArrayBase(const hkArrayBase&) = delete;
     auto operator=(const hkArrayBase&) = delete;
 
+    HK_FORCE_INLINE int getSize() const;
+    HK_FORCE_INLINE int getCapacity() const;
+    HK_FORCE_INLINE int getCapacityAndFlags() const;
+    HK_FORCE_INLINE hkBool isEmpty() const;
+
+    HK_FORCE_INLINE void clear();
+    HK_FORCE_INLINE void _clearAndDeallocate(hkMemoryAllocator& allocator);
+
 protected:
     T* m_data;
     int m_size;
@@ -41,11 +52,13 @@ public:
     HK_FORCE_INLINE hkArray() = default;
     explicit hkArray(hkFinishLoadedObjectFlag f) : hkArrayBase<T>(f) {}
 
-    HK_FORCE_INLINE ~hkArray();
+    HK_FORCE_INLINE ~hkArray() { clearAndDeallocate(); }
 
     HK_FORCE_INLINE hkArray& operator=(const hkArrayBase<T>& other);
     HK_FORCE_INLINE hkArray& operator=(const hkArray& other);
 
+    HK_FORCE_INLINE void clearAndDeallocate();
+
 protected:
     HK_FORCE_INLINE hkArray(const hkArray& other);
 };
@@ -58,3 +71,47 @@ template <typename T>
 inline hkArrayBase<T>::~hkArrayBase() {
     // Assert non-POD element destruction
 }
+
+template <typename T>
+inline int hkArrayBase<T>::getSize() const {
+    return m_size;
+}
+
+template <typename T>
+inline int hkArrayBase<T>::getCapacity() const {
+    return m_capacityAndFlags & static_cast<int>(CAPACITY_MASK);
+}
+
+template <typename T>
+inline int hkArrayBase<T>::getCapacityAndFlags() const {
+    return m_capacityAndFlags;
+}
+
+template <typename T>
+inline hkBool hkArrayBase<T>::isEmpty() const {
+    return m_size == 0;
+}
+
+template <typename T>
+inline void hkArrayBase<T>::clear() {
+    hkArrayUtil::destruct(m_data, m_size);
+    m_size = 0;
+}
+
+template <typename T>
+inline void hkArrayBase<T>::_clearAndDeallocate(hkMemoryAllocator& allocator) {
+    clear();
+    if ((m_capacityAndFlags & DONT_DEALLOCATE_FLAG) == 0) {
+        const int SIZE_ELEM = hkSizeOfTypeOrVoid<T>::val;
+        int numBytes = getCapacity() * SIZE_ELEM;
+        void* storage = const_cast<std::remove_const_t<T>*>(m_data);
+        allocator.bufFree(storage, numBytes);
+    }
+    m_data = nullptr;
+    m_capacityAndFlags = DONT_DEALLOCATE_FLAG;
+}
+
+template <typename T, typename Allocator>
+inline void hkArray<T, Allocator>::clearAndDeallocate() {
+    this->_clearAndDeallocate(AllocatorType().get());
+}
diff --git a/lib/hkStubs/Havok/Common/Base/Container/Array/hkArrayUtil.h b/lib/hkStubs/Havok/Common/Base/Container/Array/hkArrayUtil.h
new file mode 100644
index 00000000..8a5c8241
--- /dev/null
+++ b/lib/hkStubs/Havok/Common/Base/Container/Array/hkArrayUtil.h
@@ -0,0 +1,51 @@
+#pragma once
+
+#include <Havok/Common/Base/hkBase.h>
+
+class hkArrayUtil {
+public:
+    template <typename T>
+    static HK_FORCE_INLINE void construct(T* t, int n);
+
+    template <typename T>
+    static HK_FORCE_INLINE void constructWithCopy(T* t, int n, const T& tcopy);
+
+    template <typename T>
+    static HK_FORCE_INLINE void constructWithArray(T* t, int n, const T* tcopy);
+
+    template <typename T>
+    static HK_FORCE_INLINE void destruct(T* t, int n);
+
+    static hkResult _reserve(hkMemoryAllocator& a, void*, int reqElem, int sizeElem);
+    static void _reserveMore(hkMemoryAllocator& a, void* array, int sizeElem);
+    static void _reduce(hkMemoryAllocator& a, void* array, int sizeElem, char* inplaceMem,
+                        int requestedCapacity);
+};
+
+template <typename T>
+inline void hkArrayUtil::construct(T* t, int n) {
+    for (int i = 0; i < n; ++i) {
+        ::new (static_cast<void*>(t + i)) T;
+    }
+}
+
+template <typename T>
+inline void hkArrayUtil::constructWithCopy(T* t, int n, const T& tcopy) {
+    for (int i = 0; i < n; ++i) {
+        ::new (static_cast<void*>(t + i)) T(tcopy);
+    }
+}
+
+template <typename T>
+inline void hkArrayUtil::constructWithArray(T* t, int n, const T* tcopy) {
+    for (int i = 0; i < n; ++i) {
+        ::new (static_cast<void*>(t + i)) T(tcopy[i]);
+    }
+}
+
+template <typename T>
+inline void hkArrayUtil::destruct(T* t, int n) {
+    for (int i = n - 1; i >= 0; --i) {
+        static_cast<T*>(t)[i].~T();
+    }
+}