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![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-2025-12-1000x1000.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
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![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
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![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-A-2025-10-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-A-2025-12-1000x1000.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
New
-56 %
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-2025-800x800.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-2025-10-800x800.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-2025-12-800x800.png "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
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![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
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![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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 UPK339 [ASSMBLED]")
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![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-A-2025-10-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
![AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-339-AR15C/UPK-339-AR15C-A-2025-12-800x800.jpg "AR-15 .223/5.56 16\" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [ASSMBLED]")
AR-15 .223/5.56 16" BARREL W/ HANDGUARD SIZE OPTION | CARBINE UPPER BUILD UPK339 [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-339-AR15C
Product Views: 26
$269.99
$619.99
Available Options
CERAKOTE BLUE FLAME |AR-15 Mil-Spec Upper Receiver - Made In U.S.A
CERAKOTE CAMO BLU |AR-15 Charging Handle - Base BLK - Pattern - BLU
CERAKOTE CAMO BLU |AR-15 Ejection Port Cover | Dust Cover Assembly - Base BLK - Pattern - BLU
FORWARD ASSIST COMPLETE MILSPEC ASSEMBLY | ARFA
HANDGUARD OPTIONS
CERAKOTE BLUEFLAME | AR-15 10'' Free Float Quad Rail Handguard
CERAKOTE BLUEFLAME | AR-15 12'' Free Float Quad Rail Handguard
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.
Tags:
AR-15
, .223
, 5.56
, 16" BARREL
, HANDGUARD
, CARBINE UPPER BUILD
, UPK339
, ASSMBLED
, OutdoorSportsUSA