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AR-15 Rifles, Parts, Uppers & Kits

Shop AR-15 5.56 & .223 rifles, parts, uppers, & more at Palmetto State Armory. Find high-quality AR-15s, trusted brands, and expertly crafted components. Customize or build from scratch with our vast inventory of barrels, stocks, and triggers. Palmetto State Armory is your destination for the best AR-15 essentials at competitive prices.

Shop AR-15 rifles, parts, uppers, & more at Palmetto State Armory. Find high-quality guns such as AR-15 .223 rifles and AR pistols from trusted brands, and expertly crafted components. Customize or build from scratch with our vast inventory of barrels, stocks, and triggers. Palmetto State Armory is your destination for the best AR-15 essentials at competitive prices.

Shop the complete AR-15 platform at Palmetto State Armory, your destination for rifles, uppers, lowers, parts, and build kits. Whether you’re buying a factory-built rifle or assembling a custom AR-15 from the ground up, you’ll find trusted brands, proven components, and configurations for every purpose. Explore options in popular calibers like 5.56 NATO, .300 Blackout, and more. Build it your way or buy it ready to run—all at everyday low prices.

Rifles

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Uppers

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Lower Receivers

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AR-15 Parts

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.338 ARC

.338 ARC
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Kits

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Left Handed AR-15

Left Handed AR-15
Featured Products
  1. R&D Precision AR45 Bolt Carrier Group
    R&D Precision AR45 Bolt Carrier Group
    Rating:
    87%
    (14)
    Regular Price $149.99 Special Price $29.99
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  2. PSA AR-15 16" Mid-Length 5.56 NATO 1/7 Nitride 13.5" Lightweight M-Lok MOE EPT Rifle w/MBUS Sight Set
    PSA AR-15 16" Mid-Length 5.56 NATO 1/7 Nitride 13.5" Lightweight M-Lok MOE EPT Rifle w/MBUS Sight Set
    Rating:
    98%
    (556)
    Regular Price $599.99 Special Price $579.99
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  3. LWRC IC .223 Remington AR Lower, Black - ICL5B
    LWRC IC .223 Remington AR Lower, Black - ICL5B
    Rating:
    100%
    (2)
    Regular Price $866.99 Special Price $649.99
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  1. B5 Systems Mid-Length M-LOK Handguard 8.61", Flat Dark Earth

    B5 Systems Mid-Length M-LOK Handguard 8.61", Flat Dark Earth

    Regular Price $33.99 Special Price $29.99
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  2. B5 Systems Bravo-C Mil-Spec Fixed Stock, Wolf Gray

    B5 Systems Bravo-C Mil-Spec Fixed Stock, Wolf Gray

    Regular Price $59.99 Special Price $53.99
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  3. B5 Systems Long Mil-Spec Collapsible Precision Stock, Gray

    B5 Systems Long Mil-Spec Collapsible Precision Stock, Gray

    Regular Price $243.99 Special Price $218.99
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  4. B5 Systems Long Mil-Spec Collapsible Precision Stock, OD Green

    B5 Systems Long Mil-Spec Collapsible Precision Stock, OD Green

    Regular Price $228.99 Special Price $207.99
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  5. Harris Flange Nut Adapter, Black

    Harris Flange Nut Adapter, Black

    Regular Price $11.99 Special Price $9.99
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  6. Reptilia RECC·E Carbine Stock QD Front End, Flat Dark Earth

    Reptilia RECC·E Carbine Stock QD Front End, Flat Dark Earth

    Regular Price $34.95 Special Price $31.99
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  7. Reptilia RECC·E Carbine Stock QD Front End, Black

    Reptilia RECC·E Carbine Stock QD Front End, Black

    Regular Price $34.95 Special Price $31.99
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  8. Geissele MK14 Super Modular M-LOK Free-Float Rail 10.50", Desert Dirt

    Geissele MK14 Super Modular M-LOK Free-Float Rail 10.50", Desert Dirt

    Regular Price $340.99 Special Price $306.99
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  9. Geissele MK14 Super Modular M-LOK Free-Float Rail 10.50", Black

    Geissele MK14 Super Modular M-LOK Free-Float Rail 10.50", Black

    Regular Price $361.99 Special Price $325.99
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  10. MDT Ckye-Pod Gen 2 ARMS 17 Attachment Head, Black

    MDT Ckye-Pod Gen 2 ARMS 17 Attachment Head, Black

    Regular Price $79.99 Special Price $71.99
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  11. Forward Controls Design EPC Twin Dimple TDP Spec Ejection Port Cover, OD Green

    Forward Controls Design EPC Twin Dimple TDP Spec Ejection Port Cover, OD Green

    Regular Price $53.99 Special Price $48.69
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  12. Forward Controls Design EPC Twin Dimple TDP Spec Ejection Port Cover, Black

    Forward Controls Design EPC Twin Dimple TDP Spec Ejection Port Cover, Black

    $51.99
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  13. Forward Controls Design EPC Single Dimple TDP Spec Ejection Port Cover, Flat Dark Earth

    Forward Controls Design EPC Single Dimple TDP Spec Ejection Port Cover, Flat Dark Earth

    Regular Price $59.99 Special Price $53.99
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  14. Forward Controls Design M-LOK Extended Cable Management Panel, Flat Dark Earth

    Forward Controls Design M-LOK Extended Cable Management Panel, Flat Dark Earth

    $46.99
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  15. Forward Controls Design Takedown Pin w/Dimple, Black

    Forward Controls Design Takedown Pin w/Dimple, Black

    Regular Price $55.99 Special Price $49.99
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  16. Forward Controls Design ESF-H1 Sling Adapter End Plate, Black

    Forward Controls Design ESF-H1 Sling Adapter End Plate, Black

    $52.99
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  17. Forward Controls Design Sotar Cam Pin, Black

    Forward Controls Design Sotar Cam Pin, Black

    Regular Price $20.99 Special Price $18.19
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  18. Forward Controls Design CN5F A5 Castle Nut, OD Green

    Forward Controls Design CN5F A5 Castle Nut, OD Green

    Regular Price $36.99 Special Price $32.99
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  19. Forward Controls Design CN5F A5 Castle Nut, Burnt Bronze

    Forward Controls Design CN5F A5 Castle Nut, Burnt Bronze

    Regular Price $36.99 Special Price $32.99
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  20. Forward Controls Design CN5F A5 Castle Nut, Black

    Forward Controls Design CN5F A5 Castle Nut, Black

    $24.99
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  21. Law Tactical ARIC-C Unsuppressed Internal Carrier .223 Remington/5.56x45mm/.300 AAC Blackout, Black

    Law Tactical ARIC-C Unsuppressed Internal Carrier .223 Remington/5.56x45mm/.300 AAC Blackout, Black

    Regular Price $512.99 Special Price $461.99
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  22. Brownells Lightweight Mid-Length Barrel .223 Wylde 14.50", Black

    Brownells Lightweight Mid-Length Barrel .223 Wylde 14.50", Black

    Regular Price $198.99 Special Price $178.99
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  23. Brownells Lightweight Mid-Length Barrel .223 Wylde 13.90", Black

    Brownells Lightweight Mid-Length Barrel .223 Wylde 13.90", Black

    Regular Price $200.99 Special Price $180.99
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  24. Brownells Lightweight Carbine-Length Barrel .223 Wylde 10.30", Black

    Brownells Lightweight Carbine-Length Barrel .223 Wylde 10.30", Black

    Regular Price $188.99 Special Price $169.99
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  1. Rifles 2103
  2. Pistols 932
  3. Uppers 1433
  4. Kits 747
  5. Lower Receivers 857
  6. Parts 9328
  7. Suppressors 175
  8. Left Handed AR-15 7
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AR-15 Buyer's Guide: Build or Buy?

At Palmetto State Armory, we believe in the right to keep and bear arms—and the right to build them. One of the first choices you'll face is whether to buy a complete rifle or build one from parts.

Option 1: Buying Complete

Best for: First-time owners and those who want a "grab-and-go" solution.

Buying a Complete AR-15 ensures that all components (upper, lower, buffer system) are factory-tested to work together perfectly. It comes ready to shoot right out of the box (just add an optic!).

Option 2: Building (The PSA Way)

Best for: Customizers and those looking to save money.

By purchasing a Rifle Kit and a Stripped Lower Receiver separately, you can save 11% Federal Excise Tax (FET) and learn exactly how your rifle works. Plus, you get to choose every part, from the trigger to the barrel length.

Understanding Gas Systems: Carbine vs. Mid-Length

The gas system length determines how the rifle cycles. Choosing the right one affects recoil and reliability.

  • Carbine Length (7"): The military standard (M4). It is punchy and reliable but has a sharper recoil impulse. Standard on most 14.5" and 16" barrels.
  • Mid-Length (9"): Rapidly becoming the civilian favorite for 16" barrels. It provides a smoother recoil impulse and less wear on parts because the gas pressure drops slightly before cycling the bolt.
  • Rifle Length (12"): Used on 18" and 20" barrels (like the M16). It offers the smoothest shooting experience possible.

Common Questions About AR-15s

What is the difference between 5.56 NATO and .223 Remington?

While they look identical, 5.56 NATO is loaded to a higher pressure than .223 Remington.
The Rule: You CAN shoot .223 ammo in a 5.56 barrel safely. You generally SHOULD NOT shoot 5.56 ammo in a barrel marked strictly ".223 Remington" (unless it is a .223 Wylde). PSA's 5.56 barrels and Complete Uppers can safely shoot both.

What is a "Mil-Spec" AR-15?

"Mil-Spec" stands for Military Specification. It refers to the materials and dimensions used by the US Military (e.g., 7075-T6 Aluminum for receivers, Carpenter 158 Steel for bolts). A Mil-Spec rifle ensures that you can swap parts with almost any other standard AR-15 on the market.

Can I hunt with an AR-15?

Absolutely. The AR-15 is a "Modern Sporting Rifle." While 5.56 is excellent for varmint hunting (coyotes, hogs), many hunters prefer larger calibers. We offer AR-15s in 6.5 Grendel (great for deer) and .300 Blackout (great for hogs and suppressed hunting).

Is the AR-15 a "Common Use" rifle?

Yes. With over 20 million in circulation, the AR-15 is the most popular rifle in America. Its modularity allows it to be used for home defense, competition, hunting, and recreational target shooting.