HomeIt can apply both on both Barrel and AMO19. DA ONE TECH Barrel/AMO19 Magnet Top Cap$7.99PriceAccessoryBarrel/AMO19 Top CapQuantityAdd to CartFEATURESIt can apply both on both Barrel and AMO19.CONTAINS1 Piece/PackSHIPPING / PAYMENT INFOSHIPPING METHOD 3 - 5 Business Days by USPS for USA District Only 3 - 5 Business Days by Express Delivery for All International Deliverys from Feb. 05, 2020 PAYMENT METHOD We accept PayPal. Your account will be billed in US Dollars.