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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

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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%
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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:
    93%
    (3)
    Regular Price $866.99 Special Price $649.99
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Items 1849-1872 of 16905

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  1. JP Enterprises Standard Buffer Gen 2 Silent Captured Spring Builder w/Alternative Spring Pack

    JP Enterprises Standard Buffer Gen 2 Silent Captured Spring Builder w/Alternative Spring Pack

    Regular Price $205.99 Special Price $184.99
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  2. JP Enterprises Standard Buffer Gen 2 Silent Captured Spring

    JP Enterprises Standard Buffer Gen 2 Silent Captured Spring

    Rating:
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    Regular Price $147.99 Special Price $132.99
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  3. JP Enterprises H2 Buffer Gen 2 Silent Captured Spring Builder w/Alternative Spring Pack

    JP Enterprises H2 Buffer Gen 2 Silent Captured Spring Builder w/Alternative Spring Pack

    Regular Price $248.99 Special Price $225.99
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  4. JP Enterprises H2 Buffer Gen 2 Silent Captured Spring

    JP Enterprises H2 Buffer Gen 2 Silent Captured Spring

    Rating:
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    Regular Price $214.99 Special Price $194.99
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  5. JP Enterprises Standard Buffer Gen 2 Silent Captured Spring Builder w/Alternative Spring Pack

    JP Enterprises Standard Buffer Gen 2 Silent Captured Spring Builder w/Alternative Spring Pack

    Rating:
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    Regular Price $211.99 Special Price $191.99
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  6. JP Enterprises Standard Buffer Gen 2 Silent Captured Spring

    JP Enterprises Standard Buffer Gen 2 Silent Captured Spring

    Rating:
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    Regular Price $150.99 Special Price $136.99
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  7. JP Enterprises Low Mass Operating System Bolt Carrier .308 Win, Black

    JP Enterprises Low Mass Operating System Bolt Carrier .308 Win, Black

    $261.99
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  8. JP Enterprises Enhanced Gas Ring .223 Remington

    JP Enterprises Enhanced Gas Ring .223 Remington

    Rating:
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    Regular Price $12.99 Special Price $10.99
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  9. JP Enterprises Enhanced Extractor

    JP Enterprises Enhanced Extractor

    $63.99
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  10. JP Enterprises Enhanced Bolt High Pressure Bolt Assembly Completion Group .308 Win, Black

    JP Enterprises Enhanced Bolt High Pressure Bolt Assembly Completion Group .308 Win, Black

    Regular Price $274.99 Special Price $246.99
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  11. JP Enterprises Enhanced Bolt Assembly Completion Group .308 Win, Black

    JP Enterprises Enhanced Bolt Assembly Completion Group .308 Win, Black

    Regular Price $214.99 Special Price $192.99
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  12. JP Enterprises 3-Piece Alternate Spring Pack

    JP Enterprises 3-Piece Alternate Spring Pack

    Regular Price $27.99 Special Price $24.99
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  13. JP Enterprises 5-Piece Alternate Spring Pack

    JP Enterprises 5-Piece Alternate Spring Pack

    $41.99
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  14. JP Enterprises Tuned and Polished Buffer Spring

    JP Enterprises Tuned and Polished Buffer Spring

    Regular Price $26.99 Special Price $23.99
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  15. JP Enterprises FMOS Full Mass Bolt Carrier Group .223 Remington, Black

    JP Enterprises FMOS Full Mass Bolt Carrier Group .223 Remington, Black

    Regular Price $449.99 Special Price $404.99
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  16. JP Enterprises Tuned and Polished Buffer Spring

    JP Enterprises Tuned and Polished Buffer Spring

    Regular Price $23.99 Special Price $20.99
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  17. JP Enterprises Enhanced Reliability Spring Kit, Yellow/Red

    JP Enterprises Enhanced Reliability Spring Kit, Yellow/Red

    Rating:
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    $12.99
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  18. JP Enterprises Adjustable/Reversible Selector, Black

    JP Enterprises Adjustable/Reversible Selector, Black

    Regular Price $84.99 Special Price $75.99
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  19. JP Enterprises LMOS Low Mass Bolt Carrier .223 Remington, Black

    JP Enterprises LMOS Low Mass Bolt Carrier .223 Remington, Black

    $238.99
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  20. JP Enterprises FMOS Full Mass Bolt Carrier .223 Remington, Black

    JP Enterprises FMOS Full Mass Bolt Carrier .223 Remington, Black

    $238.99
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  21. JP Enterprises CMP Service Rifle Spring Kit, Silver

    JP Enterprises CMP Service Rifle Spring Kit, Silver

    Regular Price $12.99 Special Price $10.99
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  22. JP Enterprises Reduced Power Spring Kit, Yellow

    JP Enterprises Reduced Power Spring Kit, Yellow

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    Regular Price $14.99 Special Price $12.79
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  23. Precision Armament AccuWasher Gen 2 Shim Kit 5/8-24

    Precision Armament AccuWasher Gen 2 Shim Kit 5/8-24

    $22.99
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  24. Precision Armament AccuWasher Gen 2 Shim Kit 5/8-24

    Precision Armament AccuWasher Gen 2 Shim Kit 5/8-24

    Regular Price $35.99 Special Price $31.99
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  1. Rifles 2106
  2. Pistols 934
  3. Uppers 1435
  4. Kits 747
  5. Lower Receivers 859
  6. Parts 9328
  7. Suppressors 175
  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.