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AR-15 300 Blackout Barrels

At Palmetto State Armory, you can find the best in AR-15 barrels chambered in 300 Blackout to finish off your dream build. We offer barrels from less than 10.5" to 16" to suit your build specs from brands such as Palmetto State Armory, Ballistic Advantage, FNH, and more. To match your barrel, check out our selection of AR-15 gas blocks, rails, and AR-15 muzzle devices. 

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  1. PSA 16" Pistol-Length 300AAC Blackout 1/8 Nitride Barrel - 5165449967

    PSA 16" Pistol-Length 300AAC Blackout 1/8 Nitride Barrel - 5165449967

    $109.99
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  2. PSA 16" AR-15 300AAC Blackout Pistol Length 1:8 Nitride Barrel

    PSA 16" AR-15 300AAC Blackout Pistol Length 1:8 Nitride Barrel

    Rating:
    100%
    (2)
    $119.99
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  3. Faxon Firearms Match Barrel .300 AAC Blackout 7.50", Black - Optimal Performance - 15B35P7NGQ5RNP3

    Faxon Firearms Match Barrel .300 AAC Blackout 7.50", Black - Optimal Performance - 15B35P7NGQ5RNP3

    Regular Price $231.99 Special Price $170.99
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  4. Tacfire Black Nitride Barrel for AR-15 - Precision-Crafted for Peak Accuracy - BAR30018-N

    Tacfire Black Nitride Barrel for AR-15 - Precision-Crafted for Peak Accuracy - BAR30018-N

    Regular Price $124.99 Special Price $104.99
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  5. Diamondback Firearms Barrel - Black, Unleash Precision and Performance - 300P85H50B8R

    Diamondback Firearms Barrel - Black, Unleash Precision and Performance - 300P85H50B8R

    $65.00
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  6. Superior Stainless Performance - Proof Research 12.50" AR-Type Barrel for AR-Style Rifles - 100530

    Superior Stainless Performance - Proof Research 12.50" AR-Type Barrel for AR-Style Rifles - 100530

    Regular Price $611.10 Special Price $569.00
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  7. Odin AR-15 300 Blackout 6.1" Threaded Barrel - B30016PTGBLK

    Odin AR-15 300 Blackout 6.1" Threaded Barrel - B30016PTGBLK

    Regular Price $360.99 Special Price $327.99
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  8. Rosco Bloodline AR-15 16" 300 Blackout Heavy Barrel, 1:7 Twist - BL16HB300BLK8P

    Rosco Bloodline AR-15 16" 300 Blackout Heavy Barrel, 1:7 Twist - BL16HB300BLK8P

    Regular Price $198.00 Special Price $178.20
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  9. Diamondback Firearms 300 Blackout 10" Black 1:8 Pistol Length Gas System 300P10H50B8R

    Diamondback Firearms 300 Blackout 10" Black 1:8 Pistol Length Gas System 300P10H50B8R

    $73.00
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  10. Wilson Combat .300 Blackout 16" Match Grade 6 Groove Barrel, Matte Bead Blasted Stainless - TR-300RCPG16RT7

    Wilson Combat .300 Blackout 16" Match Grade 6 Groove Barrel, Matte Bead Blasted Stainless - TR-300RCPG16RT7

    Regular Price $348.99 Special Price $257.99
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  11. Wilson Combat .300 Blackout 8" Match Grade 6 Groove Barrel, Matte Bead Blasted Stainless - TR-300SBRPG8RT7

    Wilson Combat .300 Blackout 8" Match Grade 6 Groove Barrel, Matte Bead Blasted Stainless - TR-300SBRPG8RT7

    $236.99
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  12. CMMG .300 Blackout 8" Medium Taper Barrel Sub-Assembly, Salt Bath Nitride Black - 30D810A

    CMMG .300 Blackout 8" Medium Taper Barrel Sub-Assembly, Salt Bath Nitride Black - 30D810A

    Regular Price $167.99 Special Price $159.99
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  13. CMMG .300 Blackout 16.1" Medium Taper Barrel Sub-Assembly, Bead Blast - 30DC30A

    CMMG .300 Blackout 16.1" Medium Taper Barrel Sub-Assembly, Bead Blast - 30DC30A

    Regular Price $196.99 Special Price $187.99
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  14. CMMG .300 Blackout 16.1" Medium Taper Barrel Sub-Assembly, Salt Bath Nitride Black - 30D120A

    CMMG .300 Blackout 16.1" Medium Taper Barrel Sub-Assembly, Salt Bath Nitride Black - 30D120A

    Regular Price $196.99 Special Price $164.99
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  15. PSA AR-15 Barrel 7.5" .300 Blackout Pistol-Length 1:7 Nitride - 5165449963

    PSA AR-15 Barrel 7.5" .300 Blackout Pistol-Length 1:7 Nitride - 5165449963

    Rating:
    90%
    (4)
    Out of Stock
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  16. AR-15 10.5" 300 Blackout Pistol Length Barrel

    PSA .300 Blackout AR-15 Barrel 10.5" Pistol-Length 1:8 4150V Nitride

    Rating:
    94%
    (7)
    Out of Stock
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  17. PSA 8.5" 300 AAC Blackout 1:7 Pistol Gas Nitride Barrel - 7782517

    PSA 8.5" 300 AAC Blackout 1:7 Pistol Gas Nitride Barrel - 7782517

    Rating:
    90%
    (8)
    Out of Stock
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  18. Tacfire Black Nitride Barrel for AR-15 - Precision-Crafted for Peak Accuracy - BAR30018-10N

    Tacfire Black Nitride Barrel for AR-15 - Precision-Crafted for Peak Accuracy - BAR30018-10N

    Out of Stock
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  19. Diamondback Firearms Barrel - Black, Unleash Precision and Performance - 300P16H50B8R

    Diamondback Firearms Barrel - Black, Unleash Precision and Performance - 300P16H50B8R

    Out of Stock
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  20. Proof Research AR-Type Barrel 12.50" for AR-Style, Natural - 100523

    Proof Research AR-Type Barrel 12.50" for AR-Style, Natural - 100523

    Out of Stock
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  21. Proof Research 16" Natural AR-Type Barrel - Unmatched Precision and Versatility - 100561

    Proof Research 16" Natural AR-Type Barrel - Unmatched Precision and Versatility - 100561

    Out of Stock
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  22. Rosco Bloodline 11.5" Barrel, 5.56x45mm - SPBL115556BCGGTCNGB001

    Rosco Bloodline 11.5" Barrel, 5.56x45mm - SPBL115556BCGGTCNGB001

    Out of Stock
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  23. Odin Works Barrel 300 Blackout 8" Black Threaded AR15 B-300-8-P-TG-BLK

    Odin Works Barrel 300 Blackout 8" Black Threaded AR15 B-300-8-P-TG-BLK

    Out of Stock
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  24. Seekins Precision Barrel 300 Blackout 10.5" Black Stainless Match Grade

    Seekins Precision Barrel 300 Blackout 10.5" Black Stainless Match Grade

    Out of Stock
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