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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%
    (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 2905-2928 of 16451

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  1. CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Sniper Gray - 28B940CSG

    CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Sniper Gray - 28B940CSG

    $1,425.99
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  2. CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Tungsten - 28B940CTNG

    CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Tungsten - 28B940CTNG

    $1,425.99
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  3. CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Midnight Bronze - 28B940CMB

    CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Midnight Bronze - 28B940CMB

    $1,425.99
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  4. CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Charcoal Green - 28B940CCG

    CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Charcoal Green - 28B940CCG

    $1,425.99
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  5. CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Armor Black - 28B940CAB

    CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Armor Black - 28B940CAB

    $1,425.99
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  6. CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Tungsten - 28B3D0CTNG

    CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Tungsten - 28B3D0CTNG

    $873.99
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  7. CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Titanium - 28B260CTI

    CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Titanium - 28B260CTI

    $827.99
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  8. CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Sniper Gray - 28B260CSG

    CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Sniper Gray - 28B260CSG

    Regular Price $937.99 Special Price $844.99
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  9. CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Midnight Bronze - 28B260CMB

    CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Midnight Bronze - 28B260CMB

    $827.99
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  10. CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Coyote Tan - 28B260CCT

    CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Coyote Tan - 28B260CCT

    Regular Price $937.99 Special Price $844.99
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  11. CMMG Resolute 16.10" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Mid-Length with Charging Handle - Midnight Bronze - 55BB40BMB

    CMMG Resolute 16.10" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Mid-Length with Charging Handle - Midnight Bronze - 55BB40BMB

    Rating:
    60%
    (1)
    Regular Price $571.99 Special Price $514.99
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  12. CMMG Resolute 16.10" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Mid-Length with Charging Handle - Armor Black - 55BB40BAB

    CMMG Resolute 16.10" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Mid-Length with Charging Handle - Armor Black - 55BB40BAB

    Rating:
    100%
    (1)
    Regular Price $551.99 Special Price $496.99
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  13. CMMG Resolute MK4 .300 AAC Blackout M-LOK 16.1" 1:7 Twist Upper, Midnight Bronze - 30BC40AMB

    CMMG Resolute MK4 .300 AAC Blackout M-LOK 16.1" 1:7 Twist Upper, Midnight Bronze - 30BC40AMB

    Rating:
    73%
    (3)
    Regular Price $532.99 Special Price $483.99
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  14. CMMG Resolute 16.10" Upper .300 Blackout with 1:7 M-LOK Rail - Carbine-Length w/out CH or BCG - Armor Black - 30BC40AAB

    CMMG Resolute 16.10" Upper .300 Blackout with 1:7 M-LOK Rail - Carbine-Length w/out CH or BCG - Armor Black - 30BC40AAB

    Regular Price $571.99 Special Price $514.99
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  15. CMMG Dissent 10.50" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 99B80E4AB

    CMMG Dissent 10.50" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 99B80E4AB

    Regular Price $1,407.99 Special Price $1,267.99
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  16. CMMG Dissent 10.50" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 55B8D86AB

    CMMG Dissent 10.50" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 55B8D86AB

    Regular Price $1,415.99 Special Price $1,274.99
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  17. CMMG Resolute 16.10" Upper .300 AAC Blackout with 1:7 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 30B12BBAB

    CMMG Resolute 16.10" Upper .300 AAC Blackout with 1:7 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 30B12BBAB

    Regular Price $961.99 Special Price $865.99
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  18. CMMG Resolute 16.10" Upper 5.7x28mm with 1:9 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 57B40E4AB

    CMMG Resolute 16.10" Upper 5.7x28mm with 1:9 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 57B40E4AB

    Regular Price $1,042.99 Special Price $938.99
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  19. Chiappa Firearms 19" Upper Receiver .410 Bore - Black Tactical Upper Assembly - CF500.219

    Chiappa Firearms 19" Upper Receiver .410 Bore - Black Tactical Upper Assembly - CF500.219

    Regular Price $430.99 Special Price $387.99
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  20. Spikes Tactical 16" Upper 5.56x45mm 1:7 Quad Rail Mid-Length with BCG, Black - Enhanced Carbine Upper - STU5035CQ2F

    Spikes Tactical 16" Upper 5.56x45mm 1:7 Quad Rail Mid-Length with BCG, Black - Enhanced Carbine Upper - STU5035CQ2F

    $840.99
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  21. Black Rain Ordnance Bro-Carnivore 16" Upper Receiver .450 Bushmaster - Armor Black with M-LOK Rail - 450B

    Black Rain Ordnance Bro-Carnivore 16" Upper Receiver .450 Bushmaster - Armor Black with M-LOK Rail - 450B

    $963.99
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  22. Sons of Liberty Gun Works SOLGW 14.50" Upper 5.56x45mm M-LOK Rail - Tactical Excellence - M4L89BSCHF14.5

    Sons of Liberty Gun Works SOLGW 14.50" Upper 5.56x45mm M-LOK Rail - Tactical Excellence - M4L89BSCHF14.5

    Regular Price $2,509.99 Special Price $2,280.99
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  23. Rock River Arms Coyote Carbine 16" Classic Upper .300 AAC Blackout 1:8 M-LOK Pistol-Length with BCG and CH, Black - BLK0592

    Rock River Arms Coyote Carbine 16" Classic Upper .300 AAC Blackout 1:8 M-LOK Pistol-Length with BCG and CH, Black - BLK0592

    Regular Price $917.99 Special Price $826.99
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  24. Radian Weapons Model 1 14.50" MOE Upper .223 Wylde 1:8 M-LOK Rail Mid-Length with BCG and CH, Flat Dark Earth - Versatile Precision - R0466

    Radian Weapons Model 1 14.50" MOE Upper .223 Wylde 1:8 M-LOK Rail Mid-Length with BCG and CH, Flat Dark Earth - Versatile Precision - R0466

    Regular Price $2,695.99 Special Price $1,994.99
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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.