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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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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 $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 1417-1440 of 16899

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  1. Lantac M-SPEC AR15 Field Repair Kit

    Lantac M-SPEC AR15 Field Repair Kit

    Regular Price $22.99 Special Price $19.99
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  2. Sons of Liberty Gun Works Front Sight Spring

    Sons of Liberty Gun Works Front Sight Spring

    Regular Price $3.99 Special Price $2.99
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  3. Dead Air Sandman X 7.62 Rifle Suppressor w/ KeyMo Adapter, Flat Dark Earth - SMXKMFDE

    Dead Air Sandman X 7.62 Rifle Suppressor w/ KeyMo Adapter, Flat Dark Earth - SMXKMFDE

    $999.99
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  4. Weaver Single Rail System Flat-Top Mount

    Weaver Single Rail System Flat-Top Mount

    Regular Price $28.99 Special Price $25.39
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  5. KNS Precision Inc Crosshair Standard Hooded Sight Front

    KNS Precision Inc Crosshair Standard Hooded Sight Front

    Regular Price $36.99 Special Price $32.99
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  6. Brownells Cantilever Scope Mount 30mm Picatinny

    Brownells Cantilever Scope Mount 30mm Picatinny

    Regular Price $83.99 Special Price $74.99
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  7. Brownells Mini Riser Mount Picatinny

    Brownells Mini Riser Mount Picatinny

    Regular Price $22.99 Special Price $20.69
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  8. Brownells Picatinny Carry Handle Base Aluminum

    Brownells Picatinny Carry Handle Base Aluminum

    Rating:
    47%
    (3)
    Regular Price $34.99 Special Price $30.99
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  9. Brownells Rear Sight Elevation Knob Spring, Silver

    Brownells Rear Sight Elevation Knob Spring, Silver

    Regular Price $4.99 Special Price $3.99
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  10. Brownells Front Sight Detent Spring, Silver

    Brownells Front Sight Detent Spring, Silver

    Regular Price $5.99 Special Price $4.99
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  11. Brownells A3 Elevation Index Spring, Silver Pack of 3

    Brownells A3 Elevation Index Spring, Silver Pack of 3

    Regular Price $5.99 Special Price $4.99
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  12. Brownells Rear Sight Elevation Knob Spring, Silver Pack of 3

    Brownells Rear Sight Elevation Knob Spring, Silver Pack of 3

    Regular Price $5.99 Special Price $4.99
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  13. Brownells 1.876" Tang Front Sight Detent Spring, Silver Pack of 3

    Brownells 1.876" Tang Front Sight Detent Spring, Silver Pack of 3

    Regular Price $8.99 Special Price $7.49
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  14. XS Sights A2 CSAT Mil-Spec Aperture Rear Adjustable, Black

    XS Sights A2 CSAT Mil-Spec Aperture Rear Adjustable, Black

    Regular Price $55.99 Special Price $50.39
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  15. XS Sights Tritium Backup Iron Night Sight Front/Rear Flip-Up, White/White

    XS Sights Tritium Backup Iron Night Sight Front/Rear Flip-Up, White/White

    Rating:
    100%
    (2)
    Regular Price $348.99 Special Price $316.99
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  16. Luth-AR Retro A1 Sight Assembly Rear

    Luth-AR Retro A1 Sight Assembly Rear

    Rating:
    90%
    (2)
    Regular Price $21.99 Special Price $19.49
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  17. Geissele Super Precision Scope Mount 36mm High Fits Zero Compromise Optics ZC420

    Geissele Super Precision Scope Mount 36mm High Fits Zero Compromise Optics ZC420

    Regular Price $468.99 Special Price $425.99
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  18. Geissele Super Precision Rifle National Match Scope Mount 30mm High Fits Nightforce Competition SR

    Geissele Super Precision Rifle National Match Scope Mount 30mm High Fits Nightforce Competition SR

    Regular Price $386.99 Special Price $350.99
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  19. Geissele Super Precision Scope Mount 30mm High Picatinny

    Geissele Super Precision Scope Mount 30mm High Picatinny

    Regular Price $386.99 Special Price $350.99
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  20. Geissele Super Precision Red-Dot Sight Mount Fits Aimpoint T1

    Geissele Super Precision Red-Dot Sight Mount Fits Aimpoint T1

    Regular Price $171.99 Special Price $155.99
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  21. Geissele Super Precision Absolute Co-Witness Height Optic Mount Fits Aimpoint CompM5s

    Geissele Super Precision Absolute Co-Witness Height Optic Mount Fits Aimpoint CompM5s

    Regular Price $166.99 Special Price $150.99
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  22. Geissele 7-Slot 3-Hole Accessory Rail Aluminum Fits HK SMR

    Geissele 7-Slot 3-Hole Accessory Rail Aluminum Fits HK SMR

    Regular Price $39.99 Special Price $35.99
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  23. Geissele 7-Slot 3-Hole Accessory Rail Aluminum Fits HK SMR

    Geissele 7-Slot 3-Hole Accessory Rail Aluminum Fits HK SMR

    Regular Price $39.99 Special Price $35.99
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  24. Samson A2 Manual Folding Sight Rear, Black

    Samson A2 Manual Folding Sight Rear, Black

    Regular Price $68.99 Special Price $61.59
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Items 1417-1440 of 16899

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  1. Rifles 2104
  2. Pistols 932
  3. Uppers 1434
  4. Kits 747
  5. Lower Receivers 858
  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.