In a follow up with the new outer barrels for the Tokyo Marui MWS Gas Blowback Series, Dytac will be releasing fully licensed F4 Defense F4-15 receivers and ARS Handguards for the same series... "Thank you very much for your support for the SLR B15 MWS receivers! The first batch is sold out quick and we will have our remaining batch of 50pcs available by the end of July to early August! Please let us know if you want to reserve yours before they are all gone again!