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AR-15 Uppers and Lowers

BCI Defense AR-15 Upper Receiver

As the "True Manufacturer" of the AR-15 Platform, BCI Defense offers a number of different options for your next build or firearm.  Whether building from the ground up with our Stripped Upper Receiver, or adding a 300BLK or 6.5 Grendel Complete Upper to your existing Lower Receiver, we are able to off a number of different options that can fulfill your needs without busting your budget.



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300BLK Pistol Complete Upper, 9 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$574.95

300BLK Professional Series Complete Upper, 12 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$654.95

300BLK Professional Series Complete Upper, 15 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$664.00

300BLK Professional Series Complete Upper, 9 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$644.95

5.56 Pistol Complete Upper, 9 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$559.95

5.56 Professional Series Complete Upper, 12 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$639.95

5.56 Professional Series Complete Upper, 15 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$649.00

6.5 Grendel Professional Series Complete Upper, 12 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$689.95

6.5 Grendel Professional Series Complete Upper, 15 Inch Handguard

Featuring BCI Defense manufactured Upper Receiver, Free Float Rail (M-LOK Accessory Compatible), and..

$699.00

AR-15 15 Slot Assembled Upper Receiver

The BCI Defense Upper Receiver features a 15 slot Picatinny Rail, machined in-house from a 7075..

$139.00

AR-15 15 Slot Stripped Upper Receiver

The BCI Defense Upper Receiver features a 15 slot Picatinny Rail, machined in-house from a 7075 T6 a..

$109.00

Domestic Defense Complete Quad Rail Upper w/o BCG or Charging Handle

The Domestic Defense Complete Upper Quad Rail without Bolt Carrier Group & Charging Handle...

$349.00 $269.00

Domestic Defense Complete Upper w/o BCG or Charging Handle

The Domestic Defense Complete Upper without Bolt Carrier Group & Charging Handle...

$255.00 $225.00

Sentry Complete Upper

Completely assembled and ready to install to any Mil-Spec Lower Receiver. This complete upper featur..

$589.95