![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-46-AR300BLKC/AR-300-Blackout-16-Barrel-W-10-12-15-M-LOK-Handguard-Option-Carbine-Upper-Build-U46-ASSEMBLED(1-)-1000x1000.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-46-AR300BLKC/AR-300-Blackout-16-Barrel-W-10-12-15-M-LOK-Handguard-Option-Carbine-Upper-Build-U46-ASSEMBLED(2)-1000x1000.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-46-AR300BLKC/AR-300-Blackout-16-Barrel-W-10-12-15-M-LOK-Handguard-Option-Carbine-Upper-Build-U46-ASSEMBLED(3)-1000x1000.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/NEW-BCG-N+BCG-NB-OPTION-ADD-ON-OPTIONAL-1000x1000.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/NEW-SIGHTS%20OPTION-ADD-ON-OPTIONAL-1-1000x1000.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/NEW-CH-OPTION-ADD-ON-OPTIONAL-1000x1000.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
-31 %
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-46-AR300BLKC/AR-300-Blackout-16-Barrel-W-10-12-15-M-LOK-Handguard-Option-Carbine-Upper-Build-U46-ASSEMBLED(1-)-800x800.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-46-AR300BLKC/AR-300-Blackout-16-Barrel-W-10-12-15-M-LOK-Handguard-Option-Carbine-Upper-Build-U46-ASSEMBLED(2)-800x800.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/demo/UPK-46-AR300BLKC/AR-300-Blackout-16-Barrel-W-10-12-15-M-LOK-Handguard-Option-Carbine-Upper-Build-U46-ASSEMBLED(3)-800x800.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/NEW-BCG-N+BCG-NB-OPTION-ADD-ON-OPTIONAL-800x800.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/NEW-SIGHTS%20OPTION-ADD-ON-OPTIONAL-1-800x800.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
![AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]](https://outdoorsportsusa.com/image/cache/catalog/RIFLE-UPPER-OPTION-PIC/NEW-CH-OPTION-ADD-ON-OPTIONAL-800x800.jpg "AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]")
AR 300 Blackout 16'' Barrel W/ 10'' 12'' 15'' M-LOK Handguard Option | Carbine Upper Build UPK46 [ASSEMBLED]
- Stock: In Stock
- Model: UPK-46-AR300BLKC
Product Views: 7254
$339.99
$489.99
-600x600.jpg "AR-15 Lower Receiver Parts Kit | LPK-17 Grip Option")
$36.99 $69.99
-600x600.jpg "AR-15 6-Position Carbine Buffer Tube Kit | Mil-Spec")
$28.99 $40.99
-600x600.jpg "USA Made .223/5.56/300 BLK Bolt Carrier Group - Nitride")
$79.99 $199.99
- NEW ARRIVALS
- BESTSELLERS New
- PROMOTIONS
- AR RIFLE KITS
- ASSEMBLED UPPER
-
AR PARTS
-
AR-15 Parts
- Barrels
- Bolt Carrier Groups
- Buffers
- Buffer Springs
- Buffer Tubes
- Charging Handles
- Dust Covers
- End Plate
- Forward Assists
- Gas Blocks/Tubes
- Handguards
- Lower Parts
- Muzzle Brakes
- Pistol Grips
- Stocks
- Upper receivers
- Upper Parts Combos
- Buffer Tube Kits / Stocks
- Lower Build Combos
- Lower Parts Kits
- Pistol Braces / Stabilizer
- AR-9 Parts
-
AR-10 Parts
- Pistol Brace/ Stabilizer
- Barrels
- Upper Receivers
- Bolt Carrier Groups
- Buffers
- Buffer Springs
- Buffer Tubes
- Charging handles
- Dust Covers
- End Plate
- Forward Assists
- Gas Blocks / Tubes
- Handguards
- Lower Parts
- Muzzle Brakes
- Pistol Grips
- Stocks
- Upper Parts Combos
- Buffer Tube Kits / Stocks
- Lower Build Combos
- Lower Parts Kits
- AR-47
- 300 Blackout
-
AR-15 Parts
- ENGRAVING
-
COLOR
- GOLD (GLD)
- STAINLESS STEEL & SILVER (S)
- RAW (RAW)
- ANODIZED (T) TAN
- ANODIZED (R) RED
- ANODIZED (BL) BLUE
- ANODIZED OTHER COLORS
- CERAKOTE (BLK) BLACK
- CERAKOTE (BBR) BURNT BRONZE
- CERAKOTE (FDE) FLAT DARK EARTH
- CERAKOTE (ODG) OD-GREEN
- CERAKOTE (RGB) ROBINS EGG
- CERAKOTE (RED) RED
- CERAKOTE (PNK) PINK
- CERAKOTE (SGY) SNIPER GRAY
- CERAKOTE (JBL) JESSE JAMES
- CERAKOTE (NBL) NRA BLUE
- CERAKOTE (PUR) PURPLE
- CERAKOTE (ELG) EAGLE-LITE GREEN
- POLYMER (T) TAN
- POLYMER (FDE) FLAT DARK EARTH
- POLYMER (ODG) OD-GREEN
- ACCESSORIES
- PLATFORMS
- CLEARANCE
-600x600.jpg ".223/5.56 LIGHTWEIGHT Bolt Carrier Group- Black Nitride (Made in USA)")
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![[Optional] Signature Required](https://outdoorsportsusa.com/image/cache/SIGNATURE-REQUIRED(2)-600x600.jpg "[Optional] Signature Required")
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