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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:
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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 1297-1320 of 16451

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  1. Samson HK Manual Folding Sight Front, Black

    Samson HK Manual Folding Sight Front, Black

    Regular Price $60.99 Special Price $54.79
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  2. Luth-AR A2 Sight Kit Rear

    Luth-AR A2 Sight Kit Rear

    $54.99
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  3. Swampfox Optics Freedom Rings II Rifle Scope Ring 30mm Tube 1.60" 7075-T6 Aluminum Alloy Picatinny

    Swampfox Optics Freedom Rings II Rifle Scope Ring 30mm Tube 1.60" 7075-T6 Aluminum Alloy Picatinny

    $57.99
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  4. Scalarworks LEAP/10 Lower 1/3 Co-Witness Mount 1.57" Fits Aimpoint CompM5b/CompM5s

    Scalarworks LEAP/10 Lower 1/3 Co-Witness Mount 1.57" Fits Aimpoint CompM5b/CompM5s

    Regular Price $166.99 Special Price $150.99
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  5. Scalarworks LEAP/04 Mount 1.93" Fits B&T APC/SPC/Holosun HE508T-GR X2/HS407C X2

    Scalarworks LEAP/04 Mount 1.93" Fits B&T APC/SPC/Holosun HE508T-GR X2/HS407C X2

    $151.99
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  6. GG&G Spring Actuated Sight Front Flip-Up

    GG&G Spring Actuated Sight Front Flip-Up

    Regular Price $124.99 Special Price $111.99
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  7. Leupold DeltaPoint Pro 45 deg 1-Piece AR Mount Cantilever/Picatinny/Weaver

    Leupold DeltaPoint Pro 45 deg 1-Piece AR Mount Cantilever/Picatinny/Weaver

    Regular Price $65.99 Special Price $58.79
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  8. SADLAK A2 Sight Post Assembly Front

    SADLAK A2 Sight Post Assembly Front

    Regular Price $4.99 Special Price $3.99
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  9. SADLAK A2 Front Sight Post Detent

    SADLAK A2 Front Sight Post Detent

    Regular Price $1.99 Special Price $0.99
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  10. Swampfox Optics Freedom Cantilever Scope Mount 34mm

    Swampfox Optics Freedom Cantilever Scope Mount 34mm

    $100.99
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  11. Swampfox Optics Freedom Rings Rifle Scope Ring 30mm Tube Low 7075 Aluminum Alloy Picatinny

    Swampfox Optics Freedom Rings Rifle Scope Ring 30mm Tube Low 7075 Aluminum Alloy Picatinny

    $40.99
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  12. Swampfox Optics Hostile Engagement Sight Mount 30mm 1.60" Picatinny

    Swampfox Optics Hostile Engagement Sight Mount 30mm 1.60" Picatinny

    $109.99
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  13. Sons of Liberty Gun Works Front Sight Detent, Black

    Sons of Liberty Gun Works Front Sight Detent, Black

    Regular Price $4.99 Special Price $3.99
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  14. Sons of Liberty Gun Works A2 Sight Post Front, Black

    Sons of Liberty Gun Works A2 Sight Post Front, Black

    Regular Price $5.99 Special Price $4.99
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  15. American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 34mm 1.50" Picatinny, FDE

    American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 34mm 1.50" Picatinny, FDE

    $227.99
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  16. Geissele Super Precision Red-Dot Sight Mount Fits Trijicon MRO

    Geissele Super Precision Red-Dot Sight Mount Fits Trijicon MRO

    Regular Price $162.99 Special Price $145.99
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  17. Geissele Super Precision Red-Dot Sight Mount Fits Aimpoint CompM4

    Geissele Super Precision Red-Dot Sight Mount Fits Aimpoint CompM4

    Regular Price $185.99 Special Price $168.99
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  18. Geissele Super Precision Red-Dot Sight Mount Fits Aimpoint Pro

    Geissele Super Precision Red-Dot Sight Mount Fits Aimpoint Pro

    Regular Price $247.99 Special Price $224.99
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  19. Geissele AR-15 Super Precision Hyper Extended Scope Mount 30mm 1.54" Picatinny

    Geissele AR-15 Super Precision Hyper Extended Scope Mount 30mm 1.54" Picatinny

    Regular Price $366.99 Special Price $332.99
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  20. American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 34mm 1.93" Picatinny

    American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 34mm 1.93" Picatinny

    $230.99
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  21. American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 34mm 1.50" Picatinny, Black

    American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 34mm 1.50" Picatinny, Black

    $224.99
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  22. American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 35mm 1.50" Picatinny

    American Defense Mfg AD-RECON 2" Cantilever Scope Mount w/Standard Lever 35mm 1.50" Picatinny

    $224.99
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  23. Crosstac Front Sight Picatinny Rail

    Crosstac Front Sight Picatinny Rail

    Rating:
    100%
    (1)
    Regular Price $71.99 Special Price $63.99
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  24. Doublestar Corp. 5-Slot 45 deg Angle Mount Dovetail

    Doublestar Corp. 5-Slot 45 deg Angle Mount Dovetail

    Regular Price $27.99 Special Price $24.99
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Items 1297-1320 of 16451

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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.