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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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.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%
    (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 3673-3696 of 16451

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  1. FN Barrel 556NATO 14.7" Black Hammer Forged Carbine AR Rifles

    FN Barrel 556NATO 14.7" Black Hammer Forged Carbine AR Rifles

    Regular Price $388.99 Special Price $349.99
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  2. Rosco Bloodline 12.5" Barrel, 5.56x45mm - SPBL125556BCGGTCNGB001

    Rosco Bloodline 12.5" Barrel, 5.56x45mm - SPBL125556BCGGTCNGB001

    Regular Price $326.99 Special Price $295.99
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  3. FN America AR-15 10.5" Barrel, 1:7 Twist Button Broached, Black - 20100037

    FN America AR-15 10.5" Barrel, 1:7 Twist Button Broached, Black - 20100037

    Regular Price $310.99 Special Price $279.99
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  4. FN America AR-15 18" Barrel 1:7 Twist Button Broached, Black - 20100042

    FN America AR-15 18" Barrel 1:7 Twist Button Broached, Black - 20100042

    Regular Price $310.99 Special Price $279.99
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  5. Ballistic Advantage Barrel, 6.5 Creedmoor, 24", Silver, 1:8

    Ballistic Advantage Barrel, 6.5 Creedmoor, 24", Silver, 1:8

    Regular Price $354.99 Special Price $318.99
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  6. HM Defense .223 Remington Upper with 16" Barrel, Black - 16MBUP556L

    HM Defense .223 Remington Upper with 16" Barrel, Black - 16MBUP556L

    Regular Price $962.99 Special Price $773.99
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  7. Primary Weapons Systems MK111 Pro Upper Upper 223 Wylde 556NATO 11.85" Black MLOK AR Rifles AR-15

    Primary Weapons Systems MK111 Pro Upper Upper 223 Wylde 556NATO 11.85" Black MLOK AR Rifles AR-15

    Regular Price $880.99 Special Price $799.99
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  8. B5 Systems Grip Plug for Type 23 and 22, Black - GRP1457

    B5 Systems Grip Plug for Type 23 and 22, Black - GRP1457

    Rating:
    87%
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    Regular Price $12.99 Special Price $10.99
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  9. Ultradyne USA Pulse, Compensator, 350 Legend, Black - UD11170

    Ultradyne USA Pulse, Compensator, 350 Legend, Black - UD11170

    Regular Price $115.99 Special Price $103.99
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  10. Duramag AR15 7 Round Black Magazine, .450 Bushmaster - 7X45041175CPD

    Duramag AR15 7 Round Black Magazine, .450 Bushmaster - 7X45041175CPD

    Rating:
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    Regular Price $29.99 Special Price $26.89
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  11. Midwest Industries Stock Base Plate, Fits CZ Scorpion, Black

    Midwest Industries Stock Base Plate, Fits CZ Scorpion, Black

    Rating:
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    Regular Price $52.95 Special Price $47.95
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  12. Strike Industries Link Anchor Handstop, Black, Fits MLOK and Keymod

    Strike Industries Link Anchor Handstop, Black, Fits MLOK and Keymod

    Rating:
    96%
    (11)
    Regular Price $18.99 Special Price $13.99
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  13. Bootleg Gas Tube, Silver, Pistol Length Gas Tube

    Bootleg Gas Tube, Silver, Pistol Length Gas Tube

    Regular Price $13.99 Special Price $11.99
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  14. Daniel Defense 5.56x45mm Upper with 11.5" Barrel, Black - 2312800275047

    Daniel Defense 5.56x45mm Upper with 11.5" Barrel, Black - 2312800275047

    Regular Price $1,321.99 Special Price $1,299.99
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  15. HM Defense .223 Remington Upper with 16" Barrel, Black - 16MBUP556

    HM Defense .223 Remington Upper with 16" Barrel, Black - 16MBUP556

    Regular Price $1,097.99 Special Price $708.99
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  16. CMMG Resolute MK4 .350 Legend Upper with 16.1" Barrel, Black - 35B5FBCAB

    CMMG Resolute MK4 .350 Legend Upper with 16.1" Barrel, Black - 35B5FBCAB

    Regular Price $1,066.99 Special Price $960.99
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  17. Battle Arms WORKHORSE Upper 223 Remington 556NATO 10.5" Black AR-15 WH-UR-10.5-556

    Battle Arms WORKHORSE Upper 223 Remington 556NATO 10.5" Black AR-15 WH-UR-10.5-556

    Regular Price $651.99 Special Price $586.99
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  18. Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - PATROLSLUPPER16556

    Sons of Liberty Gun Works .223 Remington Upper with 16" Barrel, Black - PATROLSLUPPER16556

    $665.00
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  19. Wilson Combat Super Sniper, Fluted, 308 Winchester, 1:10 Twist, Glass Bead Finish, Stainless

    Wilson Combat Super Sniper, Fluted, 308 Winchester, 1:10 Twist, Glass Bead Finish, Stainless

    Regular Price $400.99 Special Price $362.99
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  20. Angstadt Arms Upper 9mm with 6" Barrel, Black - AAUT109006

    Angstadt Arms Upper 9mm with 6" Barrel, Black - AAUT109006

    Regular Price $764.99 Special Price $688.99
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  21. Midwest Industries Upper Upper 223 Remington 556NATO 10.5" Black MLOK AR-15

    Midwest Industries Upper Upper 223 Remington 556NATO 10.5" Black MLOK AR-15

    Regular Price $643.99 Special Price $579.99
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  22. Ballistic Advantage Premium Black Series AR-15 223 Wylde 20" Barrel - BABL223022PQ

    Ballistic Advantage Premium Black Series AR-15 223 Wylde 20" Barrel - BABL223022PQ

    Regular Price $275.99 Special Price $247.99
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  23. CMMG Banshee 5.7x28mm Upper with 5" Barrel, Black - 57BBCF0AB

    CMMG Banshee 5.7x28mm Upper with 5" Barrel, Black - 57BBCF0AB

    Regular Price $986.99 Special Price $888.99
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  24. Rosco Bloodline AR-15 16" 556 Heavy Barrel, 1:7 Twist - BL16HB5567C

    Rosco Bloodline AR-15 16" 556 Heavy Barrel, 1:7 Twist - BL16HB5567C

    Regular Price $192.99 Special Price $173.99
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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.