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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

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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%
    (14)
    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 $569.99
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  3. LWRC IC .223 Remington AR Lower, Black - ICL5B
    LWRC IC .223 Remington AR Lower, Black - ICL5B
    Rating:
    100%
    (2)
    Regular Price $866.99 Special Price $649.99
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  1. psa ar15 complete classic lower no magazine

    PSA AR-15 Complete Classic Lower Receiver No Mag

    Rating:
    97%
    (394)
    $159.99
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  2. AR-15 Upper Receiver Parts

    Defense Omega Omega Rail 7.0, Carbine 01-005-10001

    Rating:
    100%
    (2)
    Regular Price $266.99 Special Price $239.99
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  3. PSA 16" Midlength 5.56 NATO 1:7 Nitride B5 MLOK Upper, No BCG & CH, OD Green

    PSA 16" Midlength 5.56 NATO 1:7 Nitride B5 MLOK Upper, No BCG & CH, OD Green

    Regular Price $199.99 Special Price $149.99
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  4. PSA 16" Midlength 5.56 NATO 1:7 Nitride B5 MLOK Upper, No BCG & CH, Black

    PSA 16" Midlength 5.56 NATO 1:7 Nitride B5 MLOK Upper, No BCG & CH, Black

    Regular Price $199.99 Special Price $149.99
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  5. Law Tactical - Gen-S AR Folding Stock Adapter - 99329

    Law Tactical - Gen-S AR Folding Stock Adapter - 99329

    $269.99
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  6. ProMag Springfield Kuna 9mm 50rd Drum Magazine - DRM-A125

    ProMag Springfield Kuna 9mm 50rd Drum Magazine - DRM-A125

    Regular Price $129.99 Special Price $89.99
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  7. Q LLC. Tall Boy .30 Cal Quickie Fast Attach Stainless Steel Silencer, Black

    Q LLC. Tall Boy .30 Cal Quickie Fast Attach Stainless Steel Silencer, Black

    $950.00
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  8. BPI Outdoors CLAW 2.0 SLING – SAND CAMO - 50038-4

    BPI Outdoors CLAW 2.0 SLING – SAND CAMO - 50038-4

    Regular Price $21.99 Special Price $19.09
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  9. BPI Outdoors CLAW 2.0 SLING – BROWN - 50036-0

    BPI Outdoors CLAW 2.0 SLING – BROWN - 50036-0

    Regular Price $21.99 Special Price $19.09
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  10. BPI Outdoors CLAW 2.0 SLING – O.D. GREEN - 50035-3

    BPI Outdoors CLAW 2.0 SLING – O.D. GREEN - 50035-3

    Regular Price $21.99 Special Price $19.09
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  11. BPI Outdoors CLAW 2.0 SLING – CAMO - 50034-6

    BPI Outdoors CLAW 2.0 SLING – CAMO - 50034-6

    Regular Price $21.99 Special Price $19.09
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  12. BPI Outdoors CLAW 2.0 SLING – BLACK - 50033-9

    BPI Outdoors CLAW 2.0 SLING – BLACK - 50033-9

    Regular Price $20.99 Special Price $18.89
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  13. BPI Outdoors CLAW 2.0 SHOTGUN SLING – CAMO - 50046-9

    BPI Outdoors CLAW 2.0 SHOTGUN SLING – CAMO - 50046-9

    Regular Price $16.99 Special Price $14.59
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  14. B5 Systems Modular Picatinny Stock (WG) MPS-1557

    B5 Systems Modular Picatinny Stock (WG) MPS-1557

    Regular Price $211.99 Special Price $190.99
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  15. B5 Systems Modular Picatinny Stock (ODG) MPS-1556

    B5 Systems Modular Picatinny Stock (ODG) MPS-1556

    Regular Price $211.99 Special Price $190.99
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  16. B5 Systems Modular Picatinny Stock (CB) MPS-1555

    B5 Systems Modular Picatinny Stock (CB) MPS-1555

    Regular Price $211.99 Special Price $190.99
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  17. B5 Systems Modular Picatinny Stock (FDE) MPS-1554

    B5 Systems Modular Picatinny Stock (FDE) MPS-1554

    Regular Price $211.99 Special Price $190.99
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  18. B5 Systems Modular Picatinny Stock (BLK) MPS-1553

    B5 Systems Modular Picatinny Stock (BLK) MPS-1553

    Regular Price $211.99 Special Price $190.99
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  19. Advanced Armament 300-SD .300 Blackout Modular Titanium Silencer, Black

    Advanced Armament 300-SD .300 Blackout Modular Titanium Silencer, Black

    $1,199.00
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  20. Advanced Armament 762-SDN-6 .30 Cal Inconel Silencer, Black

    Advanced Armament 762-SDN-6 .30 Cal Inconel Silencer, Black

    $1,199.00
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  21. Advanced Armament M4-2000 5.56 Inconel Silencer, Black

    Advanced Armament M4-2000 5.56 Inconel Silencer, Black

    $1,099.00
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  22. LWRCI High Flow 7.62 Titanium Quick Detach Suppressor, Black

    LWRCI High Flow 7.62 Titanium Quick Detach Suppressor, Black

    $1,127.00
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  23. LWRCI High Flow 5.56 Quick Detach Suppressor, Black

    LWRCI High Flow 5.56 Quick Detach Suppressor, Black

    $939.00
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  24. KDG FN SCAR STOCK - SCP5-MK2-201

    KDG FN SCAR STOCK - SCP5-MK2-201

    Regular Price $396.99 Special Price $356.99
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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.