Airtac Saiga-12K Hpa adapter already fitted with everything you would need(valve, feedlips, router) and it is air tight. Ive only used it for 2 games but I loved it especially when using full auto  . Selling it due to changing over to gas magazines because im moving away from HPA. With all Airtac adapters you get life time warrenty if any part of the adapter was to brake, just pop them a messgae and they will send out new parts free of charge. I ship through APC Overnight, so you should recieve adapter next day. I can cover PayPal fees aswell. Any questions feel free to send over a message and I can also provide shooting videos.