WeaponSystem.Start C# (CSharp) Method

    void Start()
    {
        ChangeWeapon(DefaultWeapon.name);
        Player = GameObject.FindGameObjectWithTag("Player");
    }

        protected override void Initialize()
        {
            this.IsMouseVisible = true;
            //Get Systems
            RenderSystem           = SystemManager.Instance.GetSystem <RenderSystem>();
            LoadContentSystem      = SystemManager.Instance.GetSystem <LoadContentSystem>();
            InputHandlerSystem     = SystemManager.Instance.GetSystem <InputHandler>();
            TankMovementSystem     = SystemManager.Instance.GetSystem <TankMovementSystem>();
            TitlesafeRenderSystem  = SystemManager.Instance.GetSystem <TitlesafeRenderSystem>();
            CollisionSystem        = SystemManager.Instance.GetSystem <CollisionSystem>();
            CameraFollowSystem     = SystemManager.Instance.GetSystem <CameraSceneSystem>();
            LightSystems           = SystemManager.Instance.GetSystem <FlashlightSystem>();
            MoveSystem             = SystemManager.Instance.GetSystem <MoveSystem>();
            CollisionResolveSystem = SystemManager.Instance.GetSystem <CollisionResolveSystem>();
            WallCollisionSystem    = SystemManager.Instance.GetSystem <WallCollisionSystem>();
            AISystem              = SystemManager.Instance.GetSystem <AISystem>();
            EnemyCollisionSystem  = SystemManager.Instance.GetSystem <EnemyCollisionSystem>();
            AnimationSystem       = SystemManager.Instance.GetSystem <AnimationSystem>();
            SoundSystem           = SystemManager.Instance.GetSystem <SoundSystem>();
            WeaponSystem          = SystemManager.Instance.GetSystem <WeaponSystem>();
            BulletCollisionSystem = SystemManager.Instance.GetSystem <BulletCollisionSystem>();
            HealthSystem          = SystemManager.Instance.GetSystem <HealthSystem>();

            TempGameEnder = new TempGameEnder();

            //Init systems that require initialization
            TankMovementSystem.Start();
            WallCollisionSystem.Start();
            SoundSystem.Start();
            WeaponSystem.Start();
            EnemyCollisionSystem.Start();
            BulletCollisionSystem.Start();

            _gameDependencies.GameContent = this.Content;
            _gameDependencies.SpriteBatch = new SpriteBatch(GraphicsDevice);
            // just quickly done for FPS testing
            spriteBatch            = _gameDependencies.SpriteBatch;
            _gameDependencies.Game = this;

            CreateTestEntities();

            base.Initialize();
        }