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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
Magazines

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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%
    (9)
    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 3169-3192 of 16454

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  1. Phase 5 FATman Hex Brake 1/2"-28 tpi for AR-15, Black - FATman-9mm

    Phase 5 FATman Hex Brake 1/2"-28 tpi for AR-15, Black - FATman-9mm

    Regular Price $134.99 Special Price $120.99
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  2. Aim Sports GI Style Stock Body for AR-15/M4, Black - USASM4STK

    Aim Sports GI Style Stock Body for AR-15/M4, Black - USASM4STK

    Rating:
    100%
    (5)
    $19.99
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  3. Secure Your Weapons GPS Bag Hardsided Special 1000D Nylon Weapons Case 12"x 5" - Black - GPST34SWCB

    Secure Your Weapons GPS Bag Hardsided Special 1000D Nylon Weapons Case 12"x 5" - Black - GPST34SWCB

    Regular Price $147.99 Special Price $124.99
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  4. Warne Scope Mounts Super High MSR Mount 34mm Tube 1.9" Cantilever - SHXSKEL34TW

    Warne Scope Mounts Super High MSR Mount 34mm Tube 1.9" Cantilever - SHXSKEL34TW

    Regular Price $204.99 Special Price $184.99
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  5. Warne Scope Mounts Super High MSR Mount 34mm Tube 1.9" Cantilever - SHXSKEL34DE

    Warne Scope Mounts Super High MSR Mount 34mm Tube 1.9" Cantilever - SHXSKEL34DE

    Regular Price $215.99 Special Price $194.99
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  6. Warne Scope Mounts Super High MSR Mount 30mm Tube 1.9" Cantilever - SHXSKEL30DE

    Warne Scope Mounts Super High MSR Mount 30mm Tube 1.9" Cantilever - SHXSKEL30DE

    Rating:
    40%
    (1)
    Regular Price $176.99 Special Price $159.99
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  7. Warne Scope Mounts Super High MSR Mount 30mm Tube 1.9" Cantilever - SHXSKEL30TW

    Warne Scope Mounts Super High MSR Mount 30mm Tube 1.9" Cantilever - SHXSKEL30TW

    Regular Price $167.99 Special Price $150.99
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  8. Geissele MK16 M-LOK Super Modular Rail 9.30" for AR-15 in rugged desert dirt - 05-651S

    Geissele MK16 M-LOK Super Modular Rail 9.30" for AR-15 in rugged desert dirt - 05-651S

    $357.00
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  9. Geissele MK16 M-LOK Super Modular Rail 9.30" for AR-15 in classic Black - 05-651B

    Geissele MK16 M-LOK Super Modular Rail 9.30" for AR-15 in classic Black - 05-651B

    $332.00
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  10. Aim Sports M-LOK Wraith Handguard 13.50" for AR-15/M4, Black - USAS002

    Aim Sports M-LOK Wraith Handguard 13.50" for AR-15/M4, Black - USAS002

    Regular Price $112.99 Special Price $100.99
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  11. Midwest Industries 1-Piece G4 Free-Float Handguard 13.37" for AR-15, Black - MI-G4M13.375

    Midwest Industries 1-Piece G4 Free-Float Handguard 13.37" for AR-15, Black - MI-G4M13.375

    Regular Price $224.99 Special Price $201.99
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  12. Midwest Industries 1-Piece G4 M-LOK Free-Float Handguard 14" for AR-15, Black - MI-G4M14

    Midwest Industries 1-Piece G4 M-LOK Free-Float Handguard 14" for AR-15, Black - MI-G4M14

    Regular Price $227.99 Special Price $204.99
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  13. Stay Tactical with Strike Industries Gridlok Full Duty Rail 9" - Black - SI-GRIDLOK-416-FD-9

    Stay Tactical with Strike Industries Gridlok Full Duty Rail 9" - Black - SI-GRIDLOK-416-FD-9

    $287.95
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  14. Midwest Industries Combat Rail DPMS High M-LOK Handguard 15" for AR-308/LR-308, Black - MI-CR308-15

    Midwest Industries Combat Rail DPMS High M-LOK Handguard 15" for AR-308/LR-308, Black - MI-CR308-15

    Regular Price $233.99 Special Price $209.99
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  15. Midwest Industries Combat Rail DPMS Low M-LOK Handguard 15" for AR-308/LR-308, Black - MI-CRL308-15

    Midwest Industries Combat Rail DPMS Low M-LOK Handguard 15" for AR-308/LR-308, Black - MI-CRL308-15

    Regular Price $233.99 Special Price $209.99
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  16. Nanuk 985 NK-7 Resin Case with Cubed Foam - Olive - Olive Drab Excellence - 985-AR06

    Nanuk 985 NK-7 Resin Case with Cubed Foam - Olive - Olive Drab Excellence - 985-AR06

    $394.99
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  17. Nanuk 985 NK-7 Resin Case with Cubed Foam - Premium Storage in Black - 985-AR01

    Nanuk 985 NK-7 Resin Case with Cubed Foam - Premium Storage in Black - 985-AR01

    Regular Price $438.99 Special Price $394.99
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  18. Nanuk 990 NK-7 Resin Case with Cubed Foam - Olive - Heavy-Duty Olive Storage - 990-AR06

    Nanuk 990 NK-7 Resin Case with Cubed Foam - Olive - Heavy-Duty Olive Storage - 990-AR06

    $459.99
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  19. Strike Industries Gridlok LITE Rail 17" for M4 Upper Receiver, Red - SI-GRIDLOK-LITE-17-RED

    Strike Industries Gridlok LITE Rail 17" for M4 Upper Receiver, Red - SI-GRIDLOK-LITE-17-RED

    Regular Price $260.99 Special Price $234.99
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  20. Proof Research AR-Type Barrel 12.50" for AR-Style, Natural - 100523

    Proof Research AR-Type Barrel 12.50" for AR-Style, Natural - 100523

    Regular Price $1,100.99 Special Price $999.99
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  21. Strike Industries Gridlok Full Duty Rail 16" for HK 416, Black - SI-GRIDLOK-416-FD-16

    Strike Industries Gridlok Full Duty Rail 16" for HK 416, Black - SI-GRIDLOK-416-FD-16

    $399.95
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  22. Proof Research 20" Natural AR-Type Barrel for AR-Style Rifles - Precision Redefined - 100042

    Proof Research 20" Natural AR-Type Barrel for AR-Style Rifles - Precision Redefined - 100042

    Regular Price $1,100.99 Special Price $999.99
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  23. Superior Stainless Performance - Proof Research 12.50" AR-Type Barrel for AR-Style Rifles - 100530

    Superior Stainless Performance - Proof Research 12.50" AR-Type Barrel for AR-Style Rifles - 100530

    Regular Price $715.99 Special Price $649.99
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  24. Proof Research AR-Type Barrel 11.50" for AR-Style, Stainless - 100387

    Proof Research AR-Type Barrel 11.50" for AR-Style, Stainless - 100387

    $569.99
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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 167
  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.