Brownells New BRN-180 Upper in 300 Blackout


Brownells Releases Gen2 BRN-180 Uppers, Including 300 AAC Blackout

GRINNELL, Iowa (August 10, 2020) – Brownells announced the next generation of its popular BRN-180 uppers, including the much-anticipated version chambered in 300 AAC Blackout, perfect for use with a suppressor.

Launched at SHOT Show 2019 in Las Vegas, Nevada, the BRN-180 uppers combine features of the classic AR-180 with modern upgrades such as a full-length Picatinny rail and a free-float M-LOK handguard.

All BRN-180 Gen2 uppers are ideal for folding stocks or braces as the recoil mechanism is totally contained inside the upper.

The BRN-180 Gen2 updates include a new method of securing the handguard and adjustable gas blocks for all barrel lengths to optimize suppressor use.

The newest model has a 10” barrel chambered in 300 AAC Blackout, well-suited for a building a BRN-180S pistol or a registered short barreled rifle.

The other Gen2 BRN-180 uppers are still chambered in 223 Wylde to maximize accuracy potential with both 5.56 and .223 Remington ammunition.

In stock and shipping now, the Gen2 BRN-180 uppers include:
• 078-000-609  BRN-180S GEN2 Upper,  300 Blackout 10” barrel, $899.99 retail
• 078-000-599  BRN-180S GEN2 Upper, 223 Wylde 10.5” barrel, $899.99 retail
• 078-000-600  BRN-180 GEN2 Upper, 223 Wylde 16” barrel, $899.99 retail
• 078-000-601  BRN-180 GEN2 Upper,  223 Wylde 18.5” barrel, $899.99 retail

Going forward, Brownells will sell only the Gen2 version of its BRN-180 uppers.

To learn more, see the Brownells BRN-180 page.


  1. Looks nice.

    Still, if I don’t have anything in 300 BLK I’ve mostly eliminated the possibility of cross-chambering with one of the 5.56×45 guns we do have. Call it an engineered, as opposed to administrative, control.


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