MMC Armory AR-15/LR-308/AR-10 Uppers and Upper Parts offer a wide variety of upper receivers, dust covers, forward assist buttons, barrels, handguards and more. We've got everything you need to build that retro carry handle rifle as well as modern flat top receivers. We also have several choices that will give your build the look and feel of something highly customized. Some of the manufacturers offered are Faxon, Strike Industries, Aero Precision, Odin Works, Unique ARs, Guntec, Fail Zero, Fortis, and many more. With a huge variety of caliber options such as .223 Wylde, 5.56 NATO, .224 Valkyrie, 300 Legend, .458 SOCOM, 12.7x42 (.50 Beowulf), .450 Bushmaster, 9mm, 7.62x39, 300 Blackout (AAC), 6.5 Creedmoor, 6.5 Gendel, 45 ACP, and .243 WIN, there is something for everyone.