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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

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Pistols

Pistols
Kits

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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:
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    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%
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    Regular Price $866.99 Special Price $649.99
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  1. Brownells AR-15/M16 Lower Receiver Vise Block, Black

    Brownells AR-15/M16 Lower Receiver Vise Block, Black

    Regular Price $17.99 Special Price $15.99
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  2. Brownells AR-15/M16 Upper Receiver Action Block, Black

    Brownells AR-15/M16 Upper Receiver Action Block, Black

    Regular Price $42.99 Special Price $38.99
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  3. Brownells AR-15/M16 Action and Lower Receiver Vise Block Set, Black

    Brownells AR-15/M16 Action and Lower Receiver Vise Block Set, Black

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    Regular Price $51.99 Special Price $46.99
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  4. Brownells AR-15/M16 Bolt Radius Scraper

    Brownells AR-15/M16 Bolt Radius Scraper

    Regular Price $24.99 Special Price $21.99
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  5. Brownells Carrier Key Staking Tool

    Brownells Carrier Key Staking Tool

    Regular Price $93.99 Special Price $84.99
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  6. Brownells AR-15/M16 Barrel Extension Torque Tool

    Brownells AR-15/M16 Barrel Extension Torque Tool

    Regular Price $38.99 Special Price $34.99
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  7. Brownells 5.38" x 3" x 1" AR Lower Receiver Vise Block, White

    Brownells 5.38" x 3" x 1" AR Lower Receiver Vise Block, White

    Regular Price $35.99 Special Price $31.69
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  8. Brownells AR-15/M16 Handguard Removal Tool

    Brownells AR-15/M16 Handguard Removal Tool

    Rating:
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    Regular Price $20.99 Special Price $18.79
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  9. Brownells Field Maintenance Pack

    Brownells Field Maintenance Pack

    Regular Price $338.99 Special Price $307.99
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  10. Brownells 0.12" AR-15/M16/M4 Round Replacement Pin, Blue Pack of 3

    Brownells 0.12" AR-15/M16/M4 Round Replacement Pin, Blue Pack of 3

    Regular Price $9.99 Special Price $8.49
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  11. Brownells Ejector Removal Tool

    Brownells Ejector Removal Tool

    Regular Price $72.99 Special Price $65.99
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  12. Brownells Handguard Alignment Tool

    Brownells Handguard Alignment Tool

    Regular Price $62.99 Special Price $56.99
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  13. Brownells 4" x 1.68" Front Sight Bench Block, Black

    Brownells 4" x 1.68" Front Sight Bench Block, Black

    Regular Price $57.99 Special Price $51.99
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  14. Brownells AR-15 Upper Receiver Lapping Tool

    Brownells AR-15 Upper Receiver Lapping Tool

    Regular Price $31.99 Special Price $29.09
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  15. Sinclair International .22 Cal Lug Recess Cleaning Tool

    Sinclair International .22 Cal Lug Recess Cleaning Tool

    Regular Price $35.99 Special Price $31.69
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  16. Sinclair International Bolt Vise

    Sinclair International Bolt Vise

    Rating:
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    Regular Price $34.99 Special Price $30.99
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  17. Sinclair International .223 Cal Cleaning Link

    Sinclair International .223 Cal Cleaning Link

    Regular Price $15.99 Special Price $13.99
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  18. J Dewey Rods .223 Cal/5.56x45mm #8-32 Male Chamber Mop

    J Dewey Rods .223 Cal/5.56x45mm #8-32 Male Chamber Mop

    Regular Price $4.99 Special Price $4.09
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  19. Rock River Arms Tactical CAR Stock Wrench, Black

    Rock River Arms Tactical CAR Stock Wrench, Black

    Regular Price $7.99 Special Price $6.79
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  20. IOSSO Products 6.5 Grendel Chamber Brush, Blue Pack of 2

    IOSSO Products 6.5 Grendel Chamber Brush, Blue Pack of 2

    Regular Price $6.99 Special Price $6.09
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  21. IOSSO Products .223 Cal/.308 Cal AR Rifle Gas Tube Cleaning Kit

    IOSSO Products .223 Cal/.308 Cal AR Rifle Gas Tube Cleaning Kit

    Regular Price $8.99 Special Price $7.49
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  22. IOSSO Products Refill Gas Tube Brush

    IOSSO Products Refill Gas Tube Brush

    Regular Price $6.99 Special Price $5.69
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  23. JP Enterprises Universal Vise Clamp, Red

    JP Enterprises Universal Vise Clamp, Red

    $86.99
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  24. Tipton Best Gun Vise w/Fat Wrench Combo, Gray

    Tipton Best Gun Vise w/Fat Wrench Combo, Gray

    Regular Price $125.99 Special Price $113.99
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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.