<http://gsdesigns.ca/products/mft-lar-15-magazine-coupler/#product>
<http://schema.org/description>
"These 3D printed magazine couplers allow two MFT 10-round LAR-15 magazines to be attached together by the base. When assembled, they are approximately the same size and shape of a 30-round magazine.\r\n\r\nYou will require a 9/64\" Allen wrench or similar tool in order to remove the magazines from the coupler after installation.\r\n\r\n*Magazines not included."
<http://gsdesigns.ca/products/mft-lar-15-magazine-coupler/>