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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. 300 blackout upper receiver kit

    PSA 16" Pistol-Length 300AAC Blackout 1/8 Nitride 15" Lightweight M-Lok Upper - With BCG & CH - 5165448932

    Rating:
    96% of 100
    (258)
    Regular Price $599.99 Special Price $349.99
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  2. ar-15 barreled upper

    PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate 9" Lightweight M-Lok Upper - With BCG & CH - 5165448418

    Rating:
    96% of 100
    (163)
    Regular Price $599.99 Special Price $299.99
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  3. PSA 7" Nitride 1:7 Pistol Length 300AAC Blackout Marauder AR-15 Upper Assembly, Black - No BCG/CH

    PSA 7" Nitride 1:7 Pistol Length 300AAC Blackout Marauder AR-15 Upper Assembly, Black - No BCG/CH

    Rating:
    94% of 100
    (128)
    Regular Price $409.99 Special Price $199.99
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  4. PSA 7.5" 300AAC Blackout 1/7 Nitride 9" Lightweight M-Lok Upper With BCG & CH

    PSA 7.5" 300AAC Blackout 1/7 Nitride 9" Lightweight M-Lok Upper With BCG & CH

    Rating:
    96% of 100
    (59)
    Regular Price $549.99 Special Price $329.99
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  5. PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate12" Slant M-lok Upper with BCG-CH

    PSA 10.5" Pistol-Length 300AAC 1/8 Phosphate12" Slant M-lok Upper with BCG-CH

    Rating:
    100% of 100
    (10)
    Regular Price $649.99 Special Price $379.99
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  6. PSA 16" Pistol-Length 300AAC Blackout 1/8 Nitride 15" Lightweight M-Lok Upper - With BCG & CH - 5165450142

    PSA 16" Pistol-Length 300AAC Blackout 1/8 Nitride 15" Lightweight M-Lok Upper - With BCG & CH - 5165450142

    Rating:
    92% of 100
    (76)
    Regular Price $589.99 Special Price $359.99
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  7. side view of barreled upper assembly for sale

    PSA 10.5" Pistol Length 300AAC Blackout 1:8 Nitride 9" Lightweight M-Lok Freedom Upper With BCG & CH

    Rating:
    96% of 100
    (73)
    Regular Price $479.99 Special Price $319.99
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  8. Photo PSA 7" barreled upper receiver for 300 blackout.

    PSA 7.5" 300AAC Blackout 1/8 Phosphate 9" Lightweight M-Lok Upper With Fluted Flash Can, BCG, & CH - 5165447685

    Rating:
    96% of 100
    (134)
    Regular Price $549.99 Special Price $299.99
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  9. PSA 7.5" Pistol-length 300AAC 1/8 Phosphate 6" Lightweight M-Lok Railed Upper With Romeo 5, BCG, & CH

    PSA 7.5" Pistol-length 300AAC 1/8 Phosphate 6" Lightweight M-Lok Railed Upper With Romeo 5, BCG, & CH

    Rating:
    100% of 100
    (7)
    Regular Price $669.99 Special Price $419.99
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  10. PSA 7" 300AAC 1/7 Phosphate Marauder AR-15 Upper Assembly, Black - No BCG/CH

    PSA 7" 300AAC 1/7 Phosphate Marauder AR-15 Upper Assembly, Black - No BCG/CH

    Rating:
    96% of 100
    (11)
    Regular Price $449.99 Special Price $209.99
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  11. 10.5" m-lok slant upper with bcg, ch, and mbus sight set 300 blackout upper for sale

    PSA 10.5" Pistol-Length 300AAC 1/8 12" M-lok Slant Upper - With BCG, CH, And MBUS Sight Set - 5165447571

    Rating:
    96% of 100
    (106)
    Regular Price $659.99 Special Price $379.99
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  12. PSA 7" 300AAC 1/7 Phosphate Pistol Length 300AAC Blackout Marauder AR-15 Upper Assembly, Black - No BCG/CH

    PSA 7" 300AAC 1/7 Phosphate Pistol Length 300AAC Blackout Marauder AR-15 Upper Assembly, Black - No BCG/CH

    Rating:
    96% of 100
    (33)
    Regular Price $409.99 Special Price $209.99
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  13. PSA 10.5" Pistol-Length 300AAC 1/8 12" Lightweight M-Lok Slant Upper - With BCG, CH, & MBUS Sight Set - 5165449836

    PSA 10.5" Pistol-Length 300AAC 1/8 12" Lightweight M-Lok Slant Upper - With BCG, CH, & MBUS Sight Set - 5165449836

    Rating:
    94% of 100
    (78)
    Regular Price $559.99 Special Price $379.99
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  14. PSA 8.5" Pistol-length 300AAC 1/7 Nitride 7" Lightweight M-Lok Upper with BCG & CH

    PSA 8.5" Pistol-length 300AAC 1/7 Nitride 7" Lightweight M-Lok Upper with BCG & CH

    Rating:
    100% of 100
    (6)
    Regular Price $509.99 Special Price $299.99
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  15. PSA 300 Blackout 7.5" Pistol Upper Right Side View

    PSA 7.5" 300 Blackout 1:8 Phosphate 7" Lightweight M-Lok Upper With BCG & CH

    Rating:
    98% of 100
    (57)
    Regular Price $529.99 Special Price $349.99
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  16. PSA 8.5" Pistol-length 300AAC Blackout 1/7 Nitride 7" Lightweight M-Lok Upper - No BCG or CH

    PSA 8.5" Pistol-length 300AAC Blackout 1/7 Nitride 7" Lightweight M-Lok Upper - No BCG or CH

    Rating:
    80% of 100
    (1)
    Regular Price $389.99 Special Price $219.99
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  17. PSA 7" 300AAC 1/7 Phosphate 6" Lightweight Hex M-Lok Upper W/BCG & Charging Handle

    PSA 7" 300AAC 1/7 Phosphate 6" Lightweight Hex M-Lok Upper W/BCG & Charging Handle

    Regular Price $449.99 Special Price $289.99
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  18. PSA 8.5" Pistol Length 300AAC Blackout 1:7 Nitride 7" Timber Creek M-Lok Upper No BCG & CH

    PSA 8.5" Pistol Length 300AAC Blackout 1:7 Nitride 7" Timber Creek M-Lok Upper No BCG & CH

    Regular Price $349.99 Special Price $229.99
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  19. PSA 16" Pistol-Length 300AAC Blackout 1/8 Phosphate 13.5" Lightweight M-Lok Upper - With BCG & CH

    PSA 16" Pistol-Length 300AAC Blackout 1/8 Phosphate 13.5" Lightweight M-Lok Upper - With BCG & CH

    Regular Price $599.99 Special Price $359.99
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  20. PSA JAKL 8.5" 300 Blackout 1/8 Nitride Complete Upper With BCG, Bolt Catch & Roll Pin, Smoke

    PSA JAKL 8.5" 300 Blackout 1/8 Nitride Complete Upper With BCG, Bolt Catch & Roll Pin, Smoke

    $699.99
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  21. PSA JAKL 8.5" 300 Blackout 1/8 Nitride Complete Upper With BCG, Bolt Catch & Roll Pin

    PSA JAKL 8.5" 300 Blackout 1/8 Nitride Complete Upper With BCG, Bolt Catch & Roll Pin

    Rating:
    96% of 100
    (5)
    $699.99
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  22. 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

    $829.99
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  23. PSA JAKL 14.5" Rifle Length Upper Assembly .300 AAC Nitride w/ Knurled CH, BCG, Keymo, FDE

    PSA JAKL 14.5" Rifle Length Upper Assembly .300 AAC Nitride w/ Knurled CH, BCG, Keymo, FDE

    $829.99
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  24. PSA JAKL 14.5" .300 AAC NITRIDE UPPER. NO MUZZLE DEVICE - BLK

    PSA JAKL 14.5" .300 AAC NITRIDE UPPER. NO MUZZLE DEVICE - BLK

    $799.99
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Items 1-24 of 106

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