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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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Triggers

Triggers
.338 ARC

.338 ARC
Magazines

Magazines
Pistols

Pistols
Kits

Kits
Suppressors

Suppressors
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%
    (9)
    Regular Price $149.99 Special Price $49.99
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  2. Daniel Defense 5.56mm 32rd Capacity Magazine, Black – 13-072-16539-006
    Daniel Defense 5.56mm 32rd Capacity Magazine, Black – 13-072-16539-006
    Rating:
    98%
    (18)
    Regular Price $26.99 Special Price $23.99
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  3. PSA Complete Stealth Classic Lower, Wild Cat Gray
    PSA Complete Stealth Classic Lower, Wild Cat Gray
    Rating:
    98%
    (150)
    Regular Price $199.99 Special Price $119.99
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Items 1873-1896 of 16454

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  1. KynSHOT Marksman Recoil Buffer

    KynSHOT Marksman Recoil Buffer

    Rating:
    100%
    (1)
    Regular Price $133.99 Special Price $119.99
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  2. KynSHOT Marksman Recoil Buffer

    KynSHOT Marksman Recoil Buffer

    Regular Price $136.99 Special Price $122.99
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  3. CMMG Bolt Rehab Parts Kit, Black

    CMMG Bolt Rehab Parts Kit, Black

    $65.99
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  4. Geissele B-GC Competition Match Grade Trigger Single-Stage Drop-In, Black

    Geissele B-GC Competition Match Grade Trigger Single-Stage Drop-In, Black

    $205.99
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  5. Doublestar Corp. Pistol-Length National Match Free-Float Handguard 4.19", Black

    Doublestar Corp. Pistol-Length National Match Free-Float Handguard 4.19", Black

    $51.99
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  6. Doublestar Corp. Rifle-Length National Match Standard Free-Float Handguard 12.58", Black

    Doublestar Corp. Rifle-Length National Match Standard Free-Float Handguard 12.58", Black

    Regular Price $102.99 Special Price $91.99
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  7. Atlas Bipod 1913 Picatinny Rail Adapter 4", Black

    Atlas Bipod 1913 Picatinny Rail Adapter 4", Black

    $34.99
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  8. Atlas Bipod 1913 Picatinny Rail Adapter 3.35", Black

    Atlas Bipod 1913 Picatinny Rail Adapter 3.35", Black

    $34.99
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  9. Atlas Bipod Atlas Accuracy International Bipod Adapter Spigot, Black

    Atlas Bipod Atlas Accuracy International Bipod Adapter Spigot, Black

    Regular Price $88.99 Special Price $79.99
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  10. WMD Guns Rifle-Length Gas Tube 15.18", Black

    WMD Guns Rifle-Length Gas Tube 15.18", Black

    Regular Price $19.99 Special Price $17.99
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  11. B5 Systems Bravo Mil-Spec Collapsible Stock, Black

    B5 Systems Bravo Mil-Spec Collapsible Stock, Black

    $53.99
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  12. Spikes Tactical KAOS Stock System, Black

    Spikes Tactical KAOS Stock System, Black

    $264.99
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  13. WMD Guns NiB-X Firing Pin

    WMD Guns NiB-X Firing Pin

    Regular Price $14.99 Special Price $12.69
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  14. WMD Guns Carbine-Length Gas Tube 9.75", Black

    WMD Guns Carbine-Length Gas Tube 9.75", Black

    Regular Price $14.99 Special Price $13.39
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  15. WMD Guns NiB-X Cam Pin, Silver

    WMD Guns NiB-X Cam Pin, Silver

    Regular Price $17.99 Special Price $15.39
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  16. Daniel Defense Bolt Assembly 5.56x45mm/.223 Remington/.300 AAC Blackout, Black

    Daniel Defense Bolt Assembly 5.56x45mm/.223 Remington/.300 AAC Blackout, Black

    Regular Price $87.99 Special Price $78.99
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  17. Blue Force Gear Vickers Two-Point Combat Sling 54" - 64", Coyote Brown

    Blue Force Gear Vickers Two-Point Combat Sling 54" - 64", Coyote Brown

    $57.99
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  18. Blue Force Gear Vickers Two-Point Combat Sling 54" - 64", Black

    Blue Force Gear Vickers Two-Point Combat Sling 54" - 64", Black

    $57.99
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  19. Doublestar Corp. Pistol-Length Gas Tube 6.69", Stainless Steel

    Doublestar Corp. Pistol-Length Gas Tube 6.69", Stainless Steel

    Regular Price $19.99 Special Price $17.99
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  20. Doublestar Corp. Carbine-Length Free-Float Handguard 7", Black

    Doublestar Corp. Carbine-Length Free-Float Handguard 7", Black

    $9.99
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  21. Doublestar Corp. Carbine-Length Single Heat Shield Handguard 7", Black

    Doublestar Corp. Carbine-Length Single Heat Shield Handguard 7", Black

    Regular Price $17.99 Special Price $15.99
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  22. GPS Military Grip Pod Picatinny Mount, Black

    GPS Military Grip Pod Picatinny Mount, Black

    $154.99
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  23. Crosstac Tactical Single-Point Sling Adapter, Black

    Crosstac Tactical Single-Point Sling Adapter, Black

    $18.99
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  24. Sinclair Two-Point Montana Sling, Black

    Sinclair Two-Point Montana Sling, Black

    Regular Price $78.99 Special Price $70.99
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Items 1873-1896 of 16454

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  1. Rifles 2064
  2. Pistols 887
  3. Uppers 1360
  4. Kits 757
  5. Lower Receivers 714
  6. Parts 9222
  7. Suppressors 167
  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.