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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%
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    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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  1. Brownells Dust Cover Safety Flag, Yellow

    Brownells Dust Cover Safety Flag, Yellow

    Regular Price $12.99 Special Price $11.39
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  2. Brownells Double Heatshield Carbine Handguard 6", Black

    Brownells Double Heatshield Carbine Handguard 6", Black

    Regular Price $20.99 Special Price $18.69
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  3. Brownells M4 Collapsible Buttstock, Black

    Brownells M4 Collapsible Buttstock, Black

    Regular Price $20.99 Special Price $18.79
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  4. Brownells A2 Pistol Grip, Black

    Brownells A2 Pistol Grip, Black

    Regular Price $4.99 Special Price $4.09
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  5. Brownells A2 Buttstock, Black

    Brownells A2 Buttstock, Black

    Regular Price $55.99 Special Price $49.69
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  6. Brownells A2 Stock Spacer, Black

    Brownells A2 Stock Spacer, Black

    Regular Price $5.99 Special Price $4.89
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  7. Brownells 2-Position Mil-Spec Buffer Tube, Gray

    Brownells 2-Position Mil-Spec Buffer Tube, Gray

    Regular Price $30.99 Special Price $27.69
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  8. Brownells Barrel 10mm 10.50", Black

    Brownells Barrel 10mm 10.50", Black

    Regular Price $156.99 Special Price $140.99
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  9. Brownells Rifle-Length Barrel 6.5 Grendel 24", Stainless Steel

    Brownells Rifle-Length Barrel 6.5 Grendel 24", Stainless Steel

    Regular Price $412.99 Special Price $371.99
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  10. Brownells Rifle-Length Barrel 6.5 Grendel 20", Stainless Steel

    Brownells Rifle-Length Barrel 6.5 Grendel 20", Stainless Steel

    Regular Price $354.99 Special Price $318.99
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  11. Brownells Mid-Length Barrel 6.5 Grendel 18", Stainless Steel

    Brownells Mid-Length Barrel 6.5 Grendel 18", Stainless Steel

    Regular Price $354.99 Special Price $318.99
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  12. Brownells Pistol Buffer Tube Assembly, Black

    Brownells Pistol Buffer Tube Assembly, Black

    Regular Price $59.99 Special Price $53.19
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  13. Brownells Pistol Buffer Tube, Black

    Brownells Pistol Buffer Tube, Black

    Regular Price $39.99 Special Price $35.69
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  14. Brownells Slip Ring, Black

    Brownells Slip Ring, Black

    Regular Price $19.99 Special Price $17.89
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  15. Brownells Crush Washer 0.50", Black

    Brownells Crush Washer 0.50", Black

    Regular Price $1.99 Special Price $1.69
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  16. Brownells M4 Mil-Spec Buffer Tube Assembly, Black

    Brownells M4 Mil-Spec Buffer Tube Assembly, Black

    Regular Price $64.99 Special Price $58.49
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  17. Brownells Short Muzzle Brake 1/2-28, Black

    Brownells Short Muzzle Brake 1/2-28, Black

    Regular Price $63.99 Special Price $56.89
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  18. Brownells Collapsible Mil-Spec Stock Assembly, Black

    Brownells Collapsible Mil-Spec Stock Assembly, Black

    Regular Price $71.99 Special Price $63.99
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  19. Brownells Accu-Wedge, Blaze Orange

    Brownells Accu-Wedge, Blaze Orange

    Regular Price $7.99 Special Price $6.49
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  20. Brownells Collapsible Commercial Stock Assembly, Black

    Brownells Collapsible Commercial Stock Assembly, Black

    Regular Price $99.99 Special Price $89.99
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  21. Brownells Oversized Magazine Release Button, Black

    Brownells Oversized Magazine Release Button, Black

    Regular Price $21.99 Special Price $19.69
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  22. Brownells Modular Gas Block Kit 0.75", Black

    Brownells Modular Gas Block Kit 0.75", Black

    Regular Price $72.99 Special Price $64.99
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  23. Brownells Modular Gas Block Rail, Black

    Brownells Modular Gas Block Rail, Black

    Regular Price $15.99 Special Price $13.79
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  24. Brownells Modular Gas Block 0.75", Black

    Brownells Modular Gas Block 0.75", Black

    Regular Price $36.99 Special Price $32.49
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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 165
  8. Left Handed AR-15 7
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Looking for something more specific?

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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.