Blackheart International's BHI-15 MIL-SPEC Complete Upper Receivers follow the profile of standard AR-15 mid-length systems, the BHI-15 MIL-SPEC assembly starts with an A3 flat-top upper receiver ...

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Thanks to Geissele Automatics of New Wales, Pennsylvania, civilian gun owners and firearms enthusiasts can now get their hands on an AR upper receiver worthy of US Army Special Operations Command. In ...

The MR556A1 Upper Receiver Kit allows high quality AR-style rifles to be retrofitted to HK's famous pusher rod operating system. An MR556A1 Upper Receiver Kit includes a complete barrel assembly, HK ...

Midway USA has a host of top-tier AR parts and components on sale right now with big discounts for the biggest buying season of the year. Grab something with some cash off to finish a build, or give a ...