Lots of products from Valken for Kaiju to talk about if you haven't noticed the stream of posts of Valken products for airsoft here. The latest one of course is the Valken ATS M4 Stock by Merens. Made of high strength polymer, it uses an innovative toll-less installation and removal S-lock system. This compatible with Mil-spec buffer tubes but the buffer tube is not included. It is capable of storing both brick and stick style battery packs in multiple configurations and available in tan color.