![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-1000x1000.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-10-1000x1000.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-12-1000x1000.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-15-1000x1000.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2025/0%202%2025x-1000x1000-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/1-2023%20NEW-BCG-N+BCG-NB-BCG-N-HM+BCG-N2-OPTION-ADD-ON-OPTIONAL-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0-NEW-CH-OPTION-ADD-ON-OPTIONAL-2024-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0%202024%20Rifle%20Scope%20Add-on-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/0%201%20SIGHTS-OPTIONS-2024-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/0%202%20SIGHTS-OPTIONS-2024-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/AR15-Laser-Bore-Sight-2024-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-A-2025-10-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-A-2025-12-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-A-2025-15-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
New
-55 %
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-800x800.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-10-800x800.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-12-800x800.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-2025-15-800x800.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2025/0%202%2025x-1000x1000-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/1-2023%20NEW-BCG-N+BCG-NB-BCG-N-HM+BCG-N2-OPTION-ADD-ON-OPTIONAL-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0-NEW-CH-OPTION-ADD-ON-OPTIONAL-2024-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0%202024%20Rifle%20Scope%20Add-on-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/0%201%20SIGHTS-OPTIONS-2024-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/0%202%20SIGHTS-OPTIONS-2024-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/AR15-Laser-Bore-Sight-2024-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-A-2025-10-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-A-2025-12-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-348-AR15C/UPK-348-AR15C-A-2025-15-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]")
AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK348 [ASSMBLED]
We ship fast
Most orders usually ship out fast. CERAKOTE products may take 5-7 business days to process.
- Stock: In Stock
- Model: UPK-348-AR15C
Product Views: 182
$269.99
$599.99
Available Options
AR-15 MIL-SPEC UPPER RECEIVER | 223UP
CERAKOTE BLUE FLAME |AR-15 Charging Handle
CERAKOTE BLUE FLAME |AR-15 Ejection Port Cover
CERAKOTE BLUE FLAME |Forward Assist Complete Mil Spec Assembly
CERAKOTE BLUE FLAME |AR-15/.223/5.56 Multi Ported Compensator Upsilon Muzzle Brake
HANDGUARD OPTIONS
CERAKOTE GRADIENT BLU |AR-15 10'' ANGLE CUT CLAMP ON M-LOK HANDGUARD - MADE IN USA
CERAKOTE GRADIENT BLU |AR-15 12'' ANGLE CUT CLAMP ON M-LOK HANDGUARD - MADE IN USA
CERAKOTE GRADIENT BLU |AR-15 15'' ANGLE CUT CLAMP ON M-LOK HANDGUARD - MADE IN USA
WARNING to California Residents:⚠️ According to California's Proposition 65, some products sold on this website may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.