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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. Wilson Combat Button Rifling Fluted Recon Tactical Barrel .300 AAC Blackout 16", Stainless

    Wilson Combat Button Rifling Fluted Recon Tactical Barrel .300 AAC Blackout 16", Stainless

    Rating:
    100%
    (1)
    $250.99
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  2. Faxon Firearms Button Rifled Gunner Barrel w/Pinned Gas Block .300 AAC Blackout 10.50", Black

    Faxon Firearms Button Rifled Gunner Barrel w/Pinned Gas Block .300 AAC Blackout 10.50", Black

    $194.99
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  3. Faxon Firearms Duty Pistol-Length Button Rifled Gunner Barrel .300 AAC Blackout 7.50", Black

    Faxon Firearms Duty Pistol-Length Button Rifled Gunner Barrel .300 AAC Blackout 7.50", Black

    $134.99
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  4. CMMG Multi Role Contour Barrel Sub-Assembly .300 AAC Blackout 12.50"

    CMMG Multi Role Contour Barrel Sub-Assembly .300 AAC Blackout 12.50"

    $193.99
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  5. Daniel Defense Carbine-Length S2W Stripped Barrel .300 AAC Blackout 16", Black

    Daniel Defense Carbine-Length S2W Stripped Barrel .300 AAC Blackout 16", Black

    Regular Price $407.99 Special Price $366.99
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  6. Faxon Firearms Match Gunner 5R Button Rifled Barrel .300 AAC Blackout 9", Black

    Faxon Firearms Match Gunner 5R Button Rifled Barrel .300 AAC Blackout 9", Black

    Regular Price $203.99 Special Price $182.99
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  7. Faxon Firearms Duty Gunner Button Rifled Barrel .300 AAC Blackout 10.50", Black

    Faxon Firearms Duty Gunner Button Rifled Barrel .300 AAC Blackout 10.50", Black

    Rating:
    100%
    (1)
    Regular Price $168.99 Special Price $151.99
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  8. Faxon Firearms Gunner Button Rifled Barrel .300 AAC Blackout 10.50", Black

    Faxon Firearms Gunner Button Rifled Barrel .300 AAC Blackout 10.50", Black

    Regular Price $226.99 Special Price $205.99
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  9. Faxon Firearms Match Gunner 5R Button Rifled Barrel .300 AAC Blackout 6", Black

    Faxon Firearms Match Gunner 5R Button Rifled Barrel .300 AAC Blackout 6", Black

    Regular Price $193.99 Special Price $173.99
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  10. 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

    Rating:
    100%
    (1)
    Regular Price $194.99 Special Price $174.99
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  11. Diamondback Firearms Barrel - Black, Unleash Precision and Performance - 300P85H50B8R

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

    Rating:
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    (4)
    Regular Price $81.99 Special Price $72.99
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  12. Diamondback Firearms Barrel - Black, Unleash Precision and Performance - 300P16H50B8R

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

    Rating:
    100%
    (1)
    Regular Price $105.99 Special Price $94.99
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  13. Proof Research AR-Type Barrel 12.50" for AR-Style, Natural - 100523

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

    Regular Price $1,109.99 Special Price $999.99
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  14. Odin AR-15 300 Blackout 6.1" Threaded Barrel - B30016PTGBLK

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

    Regular Price $364.99 Special Price $327.99
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  15. Rosco Bloodline 10.5" Barrel, 5.56x45mm - SPBL105556BCGGTCNGB001

    Rosco Bloodline 10.5" Barrel, 5.56x45mm - SPBL105556BCGGTCNGB001

    Rating:
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    (1)
    Regular Price $338.99 Special Price $304.99
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  16. Rosco Bloodline 12.5" Barrel, 5.56x45mm - SPBL125556BCGGTCNGB001

    Rosco Bloodline 12.5" Barrel, 5.56x45mm - SPBL125556BCGGTCNGB001

    Rating:
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    (1)
    Regular Price $347.99 Special Price $312.99
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  17. 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

    Rating:
    40%
    (3)
    Regular Price $90.99 Special Price $80.99
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  18. Q 300 Blackout Light Profile 7" 1:5 Twist Barrel for Honey Badger - BARRELHB3007

    Q 300 Blackout Light Profile 7" 1:5 Twist Barrel for Honey Badger - BARRELHB3007

    Regular Price $443.99 Special Price $425.00
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  19. Ballistic Advantage Modern Series .300 Blackout 8" Threaded Barrel, QPQ Corrosion Resistant - BABL300001M

    Ballistic Advantage Modern Series .300 Blackout 8" Threaded Barrel, QPQ Corrosion Resistant - BABL300001M

    Rating:
    60%
    (1)
    Regular Price $125.99 Special Price $112.99
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  20. 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

    Rating:
    40%
    (2)
    Regular Price $286.99 Special Price $257.99
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  21. 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

    Regular Price $290.99 Special Price $261.99
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  22. Ballistic Advantage Modern AR-15 .300 Blackout 16" Pistol-Length, QPQ

    Ballistic Advantage Modern AR-15 .300 Blackout 16" Pistol-Length, QPQ

    Regular Price $190.99 Special Price $171.99
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  23. 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 $188.99 Special Price $169.99
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  24. 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

    Rating:
    100%
    (1)
    Regular Price $225.99 Special Price $202.99
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Items 1-24 of 73

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