![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-19-AR300BLKC/1-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-19-AR300BLKC/2%202023-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
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![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-19-AR300BLKC/0%205%2025a-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](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 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0-NEW-CH-OPTION-ADD-ON-OPTIONAL-2024-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2025%20MB%20OPTIONS/AR-10%20Muzzle%20Brakes%20Option-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0%202024%20Rifle%20Scope%20Add-on-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/0%201%20SIGHTS-OPTIONS-2024-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/0%202%20SIGHTS-OPTIONS-2024-1000x1000.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
-53 %
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![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-19-AR300BLKC/2%202023-800x800.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-19-AR300BLKC/3-800x800.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
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![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](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 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0-NEW-CH-OPTION-ADD-ON-OPTIONAL-2024-800x800.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2025%20MB%20OPTIONS/AR-10%20Muzzle%20Brakes%20Option-800x800.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/0%202024%20Rifle%20Scope%20Add-on-800x800.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
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![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/2024%20NOVEMBER%20OPTIONS/0%202%20SIGHTS-OPTIONS-2024-800x800.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]
- Stock: In Stock
- Model: UPK-19-AR300BLKC
Product Views: 86708
$249.99
$529.99
$6.99 $12.99
-600x600.jpg "16\" .300 Blackout 1:7 Twist Parkerized Barrel | Made in U.S.A.")
-600x600.jpg "USA Made .223/5.56/300BLK Bolt Carrier Group - Nitride")
$75.99 $199.99
$32.99 $69.99
![AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-19-AR300BLKC/1-600x600.jpg "AR 300AAC Blackout 16'' Barrel 15'' Keymod Handguard | Carbine Upper Build UPK19 [ASSEMBLED]")
$14.99 $19.99
- NEW ARRIVALS
- PROMOTIONS
- BESTSELLERS New
-
Custom
- AR KITS
- ASSEMBLED UPPER
-
AR PARTS
-
AR-15 Parts
- Barrels
- Bolt Carrier Groups
- Upper receivers
- Handguards
- Charging Handles
- Dust Covers
- Muzzle Brakes
- Forward Assists
- Gas Blocks/Tubes
- End Plate
- Buffers
- Buffer Springs
- Buffer Tubes
- Pistol Grips
- Pistol Braces / Stabilizer
- Stocks
- Lower Parts
- Lower Parts Kits
- Buffer Tube Kits / Stocks
- Lower Build Combos
- Upper Parts Combos
- Color Parts Combos
- Safety
-
AR-9 Parts
- Barrels
- Bolt Carrier Groups
- Upper Receivers
- Handguards
- Charging Handles
- Dust Covers
- Muzzle Brakes
- Forward Assists
- End Plate
- Buffers
- Buffer Springs
- Buffer Tubes
- Pistol Grips
- Pistol Braces / Stabilizer
- Stocks
- Lower Parts
- Lower Parts Kits
- Buffer Tube Kits / Stocks
- Lower Build Combos
- Upper Parts Combos
- Safety
-
AR-10 Parts
- Barrels
- Bolt Carrier Groups
- Upper Receivers
- Handguards
- Charging handles
- Dust Covers
- Muzzle Brakes
- Forward Assists
- Gas Blocks / Tubes
- End Plate
- Buffers
- Buffer Springs
- Buffer Tubes
- Pistol Grips
- Pistol Brace/ Stabilizer
- Stocks
- Lower Parts
- Lower Parts Kits
- Buffer Tube Kits / Stocks
- Lower Build Combos
- Upper Parts Combos
- Safety
- 300 Blackout Parts
- AR-40 Parts
- AR-47 Parts
-
AR-15 Parts
- ENGRAVING
-
COLOR
- BLACK
- GOLD (GLD)
- STAINLESS STEEL & SILVER (S)
- RAW (RAW)
-
CERAKOTE
- CERAKOTE (BLK) BLACK
- CERAKOTE (GLD) GOLD
- CERAKOTE (SLV) GLACIER SILVER
- CERAKOTE (BBR) BURNT BRONZE
- CERAKOTE (FDE) FLAT DARK EARTH
- CERAKOTE (ODG) OD-GREEN
- CERAKOTE (ORG) HUNTER ORANGE
- CERAKOTE (WHI) BRIGHT WHITE
- CERAKOTE (RGB) ROBINS EGG
- CERAKOTE (RED) RUBY RED
- CERAKOTE (PNK) SIG PINK
- CERAKOTE (LEM) LEMON ZEST
- CERAKOTE (ZBG) ZOMBIE GREEN
- CERAKOTE (BLU) BLUE FLAME
- CERAKOTE (SGY) SNIPER GRAY
- CERAKOTE (NBL) NRA BLUE
- CERAKOTE (JBL) JESSE JAMES
- CERAKOTE (PUR) PURPLE
- CERAKOTE (ELG) EAGLE-LITE GREEN
- ANODIZED
- POLYMER
- ACCESSORIES
- PLATFORMS
- CLEARANCE
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-600x600.jpg "Mosin Nagant Rifle 91/30 M44 Stock 1\" Rubber Recoil Butt Pad")
