The Black Rain Ordnance Milled Flat-Top Upper Receiver (brand part no. BRO-MUR-2) gives AR-15 builders a stripped receiver machined for the .223 Remington/5.56 NATO platform, ready to accept a barrel, bolt carrier group, and handguard of the builder’s choosing. Black Rain Ordnance, founded in 2009, machines its receivers rather than casting them, aiming to build parts the company’s own team would be proud to own and display. This receiver features a flat-top design with an integrated Picatinny rail for mounting optics directly to the upper, giving builders a solid, American-machined foundation for a custom AR-15 project. Since this is a stripped upper receiver with no barrel or lower receiver included, it ships without any FFL transfer requirement.

Key Specifications

• Machined for the .223 Remington/5.56 NATO AR-15 platform.
• Built with a flat-top, Picatinny rail design for direct optic mounting.
• Sold as a milled, stripped upper receiver with no barrel or lower included.

Frequently Asked Questions

Does this receiver ship with a barrel installed? No, this is a stripped upper receiver, ready for the builder to install a barrel, bolt carrier group, and handguard.

Does it require an FFL transfer? No, a stripped upper receiver without a lower isn’t the regulated part of an AR-15, so it ships without an FFL transfer.

What optic mounting does this receiver offer? A flat-top design with an integrated Picatinny rail for direct optic mounting.

Buy the Black Rain Ordnance .223/5.56 Milled Flat-Top Upper Receiver, Black

Start your custom AR-15 build on a solid, American-machined foundation. Shop more Black Rain Ordnance receivers in our AR15 uppers selection. Order it from our Lubbock, Texas gun shop as soon as it’s available.