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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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AR-15 Parts

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.338 ARC

.338 ARC
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Pistols

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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%
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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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Items 2065-2088 of 16451

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  1. Breek Arms - Warhammer MOD2 Ambi Charging Handle - BRK522-MGRAY

    Breek Arms - Warhammer MOD2 Ambi Charging Handle - BRK522-MGRAY

    Rating:
    100%
    (9)
    Regular Price $55.99 Special Price $49.99
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  2. B&T Industries - Atlas Adjustable Leg Extensions - BT85

    B&T Industries - Atlas Adjustable Leg Extensions - BT85

    $129.99
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  3. PSA 10.5" 5.56 NATO 1/7 Nitride 9" Lightweight Hex M-Lok Upper No BCG & CH

    PSA 10.5" 5.56 NATO 1/7 Nitride 9" Lightweight Hex M-Lok Upper No BCG & CH

    Rating:
    95%
    (22)
    Regular Price $369.99 Special Price $229.99
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  4. FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

    FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

    Regular Price $6,943.99 Special Price $6,254.99
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  5. TacFire 10" Upper .45 ACP 1:16 Free Float M-LOK Picatinny Rail, Black

    TacFire 10" Upper .45 ACP 1:16 Free Float M-LOK Picatinny Rail, Black

    Regular Price $371.99 Special Price $334.99
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  6. Primary Weapons Systems MK116 Mod 2-M 16.1" Upper 7.62x39mm 1:10 M-LOK Rail Mid-Length, Black

    Primary Weapons Systems MK116 Mod 2-M 16.1" Upper 7.62x39mm 1:10 M-LOK Rail Mid-Length, Black

    Regular Price $1,532.99 Special Price $1,380.99
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  7. Primary Weapons Systems MK116 Mod 1-M 16.10" Upper .223 Wylde 1:8 M-LOK Rail Mid-Length, Black

    Primary Weapons Systems MK116 Mod 1-M 16.10" Upper .223 Wylde 1:8 M-LOK Rail Mid-Length, Black

    $999.99
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  8. Primary Weapons Systems MK116 Mod 1-M 16.10" Upper .223 Wylde 1:8 M-LOK Rail, Black

    Primary Weapons Systems MK116 Mod 1-M 16.10" Upper .223 Wylde 1:8 M-LOK Rail, Black

    Regular Price $1,165.99 Special Price $1,049.99
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  9. Spikes Tactical 16" Classic Upper 5.56x45mm/.223 Remington 1:7 Quad Rail Mid-Length, Black

    Spikes Tactical 16" Classic Upper 5.56x45mm/.223 Remington 1:7 Quad Rail Mid-Length, Black

    Regular Price $921.99 Special Price $837.99
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  10. Rise Armament 18" Upper 6mm ARC 1:7 Free Float M-LOK Picatinny Rail Aluminum Rifle-Length, Black

    Rise Armament 18" Upper 6mm ARC 1:7 Free Float M-LOK Picatinny Rail Aluminum Rifle-Length, Black

    Regular Price $1,040.99 Special Price $936.99
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  11. Rise Armament 18" Upper .22 ARC 1:7 M-LOK Picatinny Rail Aluminum Rifle-Length, Patriot Brown

    Rise Armament 18" Upper .22 ARC 1:7 M-LOK Picatinny Rail Aluminum Rifle-Length, Patriot Brown

    Rating:
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    Regular Price $880.99 Special Price $799.99
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  12. Faxon Firearms ION Ultralight 14.50" Upper 5.56x45mm M-LOK Rail, Black

    Faxon Firearms ION Ultralight 14.50" Upper 5.56x45mm M-LOK Rail, Black

    Regular Price $1,123.99 Special Price $1,011.99
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  13. FightLite MCR Dual-Feed 12.50" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

    FightLite MCR Dual-Feed 12.50" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

    $6,401.99
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  14. FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

    FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

    Regular Price $7,636.99 Special Price $6,879.99
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  15. FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 M-LOK Picatinny Rail, Black

    FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 M-LOK Picatinny Rail, Black

    $6,399.99 $6,399.99
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  16. TacFire 4" Upper .45 ACP 1:16 Free Float M-LOK Picatinny Rail, Black

    TacFire 4" Upper .45 ACP 1:16 Free Float M-LOK Picatinny Rail, Black

    Regular Price $331.99 Special Price $300.99
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  17. Stern Defense 8.50" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

    Stern Defense 8.50" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

    $467.99
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  18. Stern Defense 4" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

    Stern Defense 4" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

    Regular Price $489.99 Special Price $444.99
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  19. Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black

    Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black

    $849.99
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  20. Aero Precision EPC-9 Threaded 16" Upper 9mm 1:7 M-LOK Rail, Black

    Aero Precision EPC-9 Threaded 16" Upper 9mm 1:7 M-LOK Rail, Black

    Regular Price $575.99 Special Price $522.99
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  21. TacFire 5" Upper 7.62x39mm 1:10 Free Float M-LOK Picatinny Rail, Black

    TacFire 5" Upper 7.62x39mm 1:10 Free Float M-LOK Picatinny Rail, Black

    Regular Price $361.99 Special Price $328.99
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  22. Stern Defense 16.10" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

    Stern Defense 16.10" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

    $522.99
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  23. Sons of Liberty Gun Works L89 V2 5.56 16" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length, Black

    Sons of Liberty Gun Works L89 V2 5.56 16" Upper 5.56x45mm 1:7 M-LOK Rail Mid-Length, Black

    Rating:
    40%
    (1)
    Regular Price $1,111.99 Special Price $1,000.99
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  24. Geissele Automatics Super Duty MOD1 10.3" 5.56mm Complete Upper, DDC

    Geissele Automatics Super Duty MOD1 10.3" 5.56mm Complete Upper, DDC

    Regular Price $1,582.99 Special Price $1,438.99
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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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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.