Available on all domestic orders. Your info is safe with us. Umarex HK MP5 A4 AEG BB Airsoft Rifle. Umarex Elite Force HK Heckler & Koch MP5 A4 AEG BB Airsoft Rifle. Heckler & Koch MP5 AEG BB Airsoft Rifle is a high quality airsoft gun. The all new MP5 series features a full metal ECS Avalon gearbox and nylon polymer stock. The hop up is fully adjustable. The A4 model has a fixed rear stock with lots of battery room in its back. Other features of this gun include full metal parts it’s very heavy and robust! , upgraded selector, metal cocking handle, 14mm metal threaded outer barrel. Semi-auto and full-auto shooting. Ready to shoot out of the box! No hustle searching for compatible accessories! Great for a present! Fixed front and adjustable rear sights. Umarex Elite Force HK MP5 A4 AEG Rifle Airsoft Rifle Specifications. If the wrong contact details are provided any losses incurred as a result will be the buyers responsibility. INTERNATIONAL BUYERS – PLEASE NOTE.