Before we were given a preview of a new Japan-based airsoft uprgrade parts maker called Lambda Japan. Now their webstore is officially open and you can browse the site for upgrade parts such as those for the Tokyo Marui VSR-10 airsoft sniper rifle... "The Lambda web shop is now open. Now, it's not yet fully lined up but we are putting new products step by step. We will be adding add inner barrel (6.01mm and 6.05mm) and VSR upgrades."