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300 Blackout Uppers

Enhance your rifle's performance with our premium .300 Blackout barreled upper assemblies, engineered for superior accuracy and optimal versatility. Ideal for both subsonic and supersonic loads, these upper assemblies provide reliable functionality and seamless compatibility with your AR-15 platform.

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  1. Maxim Defense PDX 5.50" Upper .300 AAC Blackout, Black

    Maxim Defense PDX 5.50" Upper .300 AAC Blackout, Black

    Out of Stock
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  2. Aero Precision M4E1 Threaded 8" Upper .300 AAC Blackout 1:7 Pistol-Length, Flat Dark Earth

    Aero Precision M4E1 Threaded 8" Upper .300 AAC Blackout 1:7 Pistol-Length, Flat Dark Earth

    Out of Stock
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  3. Aero Precision M4E1 Threaded 8" Upper .300 AAC Blackout 1:7 M-LOK Rail Pistol-Length, Black

    Aero Precision M4E1 Threaded 8" Upper .300 AAC Blackout 1:7 M-LOK Rail Pistol-Length, Black

    Out of Stock
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  4. PSA "Sabre" Forged 8.5" Nitride .300 Black out Moss Green Upper, RAL 8000 D/C. and Burnt Bronze Rail

    PSA "Sabre" Forged 8.5" Nitride .300 Black out Moss Green Upper, RAL 8000 D/C. and Burnt Bronze Rail

    Rating:
    80%
    (8)
    Out of Stock
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  5. Aero Precision M4E1 8" Upper .300 AAC Blackout 1:7 M-LOK Pistol-Length, Black

    Aero Precision M4E1 8" Upper .300 AAC Blackout 1:7 M-LOK Pistol-Length, Black

    Out of Stock
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  6. CMMG Resolute MK4 .300 AAC Blackout M-LOK 16.1" 1:7 Twist Upper, Midnight Bronze - 30BC40AMB

    CMMG Resolute MK4 .300 AAC Blackout M-LOK 16.1" 1:7 Twist Upper, Midnight Bronze - 30BC40AMB

    Rating:
    80%
    (4)
    Out of Stock
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  7. CMMG Resolute 16.10" Upper .300 Blackout with 1:7 M-LOK Rail - Carbine-Length w/out CH or BCG - Armor Black - 30BC40AAB

    CMMG Resolute 16.10" Upper .300 Blackout with 1:7 M-LOK Rail - Carbine-Length w/out CH or BCG - Armor Black - 30BC40AAB

    Out of Stock
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  8. CMMG Dissent 10.50" Upper .300 AAC Blackout with 1:7 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 30BC239AB

    CMMG Dissent 10.50" Upper .300 AAC Blackout with 1:7 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 30BC239AB

    Out of Stock
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  9. CMMG Resolute 16.10" Upper .300 AAC Blackout with 1:7 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 30B12BBAB

    CMMG Resolute 16.10" Upper .300 AAC Blackout with 1:7 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 30B12BBAB

    Out of Stock
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  10. Rock River Arms Coyote Carbine 16" Classic Upper .300 AAC Blackout 1:8 M-LOK Pistol-Length with BCG and CH, Black - BLK0592

    Rock River Arms Coyote Carbine 16" Classic Upper .300 AAC Blackout 1:8 M-LOK Pistol-Length with BCG and CH, Black - BLK0592

    Out of Stock
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  11. PSA JAKL 14.5" RIFLE LENGTH UPPER ASSEMBLY .300 AAC NITRIDE W/KNURLED CH, BCG, ASR, FDE

    PSA JAKL 14.5" RIFLE LENGTH UPPER ASSEMBLY .300 AAC NITRIDE W/KNURLED CH, BCG, ASR, FDE

    Rating:
    100%
    (4)
    Out of Stock
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  12. Barreled Upper Receiver Assembly, 300 AAC, 14.5", FDE, Keymo, JAKL

    Barreled Upper Receiver Assembly, 300 AAC, 14.5", FDE, Keymo, JAKL

    Rating:
    100%
    (1)
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  13. Barreled Upper Receiver Assembly, 300 AAC,14.5", Blk, No Muzzle Device

    Barreled Upper Receiver Assembly, 300 AAC,14.5", Blk, No Muzzle Device

    Rating:
    100%
    (2)
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  14. Barreled Upper Receiver Assembly, 300 AAC, Blk, Silencerco, JAKL

    Barreled Upper Receiver Assembly, 300 AAC, Blk, Silencerco, JAKL

    Rating:
    100%
    (2)
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  15. Blem PSA JAKL,8.5" 300BO NATO Nitride, With BCG, Bolt Catch and Bolt Catch roll Pin

    Blem PSA JAKL,8.5" 300BO NATO Nitride, With BCG, Bolt Catch and Bolt Catch roll Pin

    Rating:
    100%
    (11)
    Out of Stock
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  16. PSA 8.5" 300AAC Blackout Phosphate 9" Lightweight Hex M-Lok Upper With BCG & CH

    PSA 8.5" 300AAC Blackout Phosphate 9" Lightweight Hex M-Lok Upper With BCG & CH

    Rating:
    80%
    (2)
    Out of Stock
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  17. PSA 7.5" 300AAC Blackout Phosphate 6" Lightweight Hex M-Lok Upper With BCG & CH

    PSA 7.5" 300AAC Blackout Phosphate 6" Lightweight Hex M-Lok Upper With BCG & CH

    Rating:
    93%
    (11)
    Out of Stock
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  18. Adams Arms P3 12.5" Complete Piston Upper .300 AAC Blackout 1:7, Black - FGAA01366

    Adams Arms P3 12.5" Complete Piston Upper .300 AAC Blackout 1:7, Black - FGAA01366

    Out of Stock
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  19. Tacfire 10" Complete Upper Assembly .300 AAC Blackout 1:8, Black - BU-300-10

    Tacfire 10" Complete Upper Assembly .300 AAC Blackout 1:8, Black - BU-300-10

    Rating:
    100%
    (2)
    Out of Stock
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  20. Radian Weapons 9" Complete Upper .300 AAC Blackout 1:5, Black - R0027

    Radian Weapons 9" Complete Upper .300 AAC Blackout 1:5, Black - R0027

    Out of Stock
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  21. Adams Arms P2 16" Complete Piston Upper .300 AAC Blackout 1:7, Black - FGAA01364

    Adams Arms P2 16" Complete Piston Upper .300 AAC Blackout 1:7, Black - FGAA01364

    Out of Stock
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  22. LanTac USA LLC PDP 300 Blackout 7.5" Black 1:8 AR15 01-FA-300-PDP-UPR

    LanTac USA LLC PDP 300 Blackout 7.5" Black 1:8 AR15 01-FA-300-PDP-UPR

    Out of Stock
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  23. LanTac USA LLC Patrol 300 Blackout 14.5" Black 1:8 AR15 01-FA-300-PATROL-UPR

    LanTac USA LLC Patrol 300 Blackout 14.5" Black 1:8 AR15 01-FA-300-PATROL-UPR

    Out of Stock
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  24. LanTac USA LLC Urban Tactical Pistol 300 Blackout 11.5" Black 1:8 AR15 01-FA-300-UTP-UPR

    LanTac USA LLC Urban Tactical Pistol 300 Blackout 11.5" Black 1:8 AR15 01-FA-300-UTP-UPR

    Out of Stock
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Items 121-144 of 173

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