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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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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:
    88%
    (10)
    Regular Price $149.99 Special Price $49.99
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  1. Harrington & Richardson Retro 635 Carbine 16" 9MM 1/10 Rifle, Black

    Harrington & Richardson Retro 635 Carbine 16" 9MM 1/10 Rifle, Black

    $1,149.99
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  2. PSA AR-15 Complete Classic Stealth BTR Lower, Black

    PSA AR-15 Complete Classic Stealth BTR Lower, Black

    Rating:
    99%
    (26)
    $169.99
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  3. Blem Harrington & Richardson 733 Pistol, 1-7, Gray, C7

    Blem Harrington & Richardson 733 Pistol, 1-7, Gray, C7

    Rating:
    70%
    (2)
    $1,099.99
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  4. Blem Harrington & Richardson COTS Complete Pistol Lower, 2 Position, Gray

    Blem Harrington & Richardson COTS Complete Pistol Lower, 2 Position, Gray

    Rating:
    95%
    (4)
    $309.99
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  5. Harrington & Richardson 733 Pistol, 1-7, Gray, C7

    Harrington & Richardson 733 Pistol, 1-7, Gray, C7

    Rating:
    100%
    (2)
    $1,149.99
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  6. Harrington & Richardson COTS Complete Pistol Lower, 2 Position, Gray

    Harrington & Richardson COTS Complete Pistol Lower, 2 Position, Gray

    $329.99
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  7. Sig Sauer MCX Spear 5.56 NATO AR-15 Pistol 11.5" 30rd, Coyote - PMCX-556N-11B-IR

    Sig Sauer MCX Spear 5.56 NATO AR-15 Pistol 11.5" 30rd, Coyote - PMCX-556N-11B-IR

    Regular Price $2,776.99 Special Price $2,500.99
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  8. DPMS "Kitty Kat" 300AAC 7.5" A4 Quad Rail CAR Brace Pistol, Black

    DPMS "Kitty Kat" 300AAC 7.5" A4 Quad Rail CAR Brace Pistol, Black

    $799.99
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  9. Sig Sauer MCX Spear 6.8x51 AR-15 Rifle 16" 20rd, Coyote - RSPEAR-68-16B-NG

    Sig Sauer MCX Spear 6.8x51 AR-15 Rifle 16" 20rd, Coyote - RSPEAR-68-16B-NG

    $4,199.99
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  10. Sig Sauer MCX Spear LT 5.56 NATO AR-15 Rifle 16" 30rd, Coyote - RMCX-556N-16B-IR

    Sig Sauer MCX Spear LT 5.56 NATO AR-15 Rifle 16" 30rd, Coyote - RMCX-556N-16B-IR

    $2,599.99
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  11. Franklin Armory Pistol Salus 5.56 NATO Equipped with BFSIII 30rd 12" - 00-30040-BLK

    Franklin Armory Pistol Salus 5.56 NATO Equipped with BFSIII 30rd 12" - 00-30040-BLK

    Regular Price $1,699.99 Special Price $1,499.99
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  12. PSA Custom 7.5" 5.56 NATO 1/7 Phosphate 7" Lightweight M-Lok Pistol W/ 3.5lb Flatbow FCG, Grey

    PSA Custom 7.5" 5.56 NATO 1/7 Phosphate 7" Lightweight M-Lok Pistol W/ 3.5lb Flatbow FCG, Grey

    $999.99
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  13. LWRC International IC DI .350 Legend 16.10" AR Rifle, Flat Dark Earth - ICDIR35CK16L

    LWRC International IC DI .350 Legend 16.10" AR Rifle, Flat Dark Earth - ICDIR35CK16L

    Regular Price $2,247.99 Special Price $2,024.99
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  14. POF-USA Minuteman 5.56x45mm 13.75" AR Rifle, Tungsten - 02046

    POF-USA Minuteman 5.56x45mm 13.75" AR Rifle, Tungsten - 02046

    Regular Price $2,060.99 Special Price $1,855.99
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  15. Rock River Arms All Terrain Hunter LAR-15M .350 Legend 16" AR Rifle, Black - 350L1562.V1

    Rock River Arms All Terrain Hunter LAR-15M .350 Legend 16" AR Rifle, Black - 350L1562.V1

    Regular Price $1,308.99 Special Price $1,189.99
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  16. Black Rain Ordnance Spec 15 We The People 5.56x45mm 16" AR Rifle, Red Battleworn - BRO-WTP-RB

    Black Rain Ordnance Spec 15 We The People 5.56x45mm 16" AR Rifle, Red Battleworn - BRO-WTP-RB

    Regular Price $1,616.99 Special Price $1,455.99
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  17. Great Lakes Firearms AR-10 .243 Winchester 24" AR Rifle, Black - GL10243SSBLK

    Great Lakes Firearms AR-10 .243 Winchester 24" AR Rifle, Black - GL10243SSBLK

    Regular Price $1,075.99 Special Price $968.99
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  18. Smith & Wesson LE M&P15 A 5.56 NATO 16" 1/9 Rifle With Troy Rear Sight, Black - 311002

    Smith & Wesson LE M&P15 A 5.56 NATO 16" 1/9 Rifle With Troy Rear Sight, Black - 311002

    Regular Price $1,046.99 Special Price $942.99
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  19. VKTR Industries VK-1 5.56x45mm 16" Rifle, Black - Reliable Tactical - V-3110-0916-601

    VKTR Industries VK-1 5.56x45mm 16" Rifle, Black - Reliable Tactical - V-3110-0916-601

    $2,199.00
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  20. Black Rain Ordnance Spec 15 We The People 5.56x45mm 16" AR Rifle, Light Sand Battleworn - BRO-WTP-LSB

    Black Rain Ordnance Spec 15 We The People 5.56x45mm 16" AR Rifle, Light Sand Battleworn - BRO-WTP-LSB

    Regular Price $1,565.99 Special Price $1,422.99
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  21. VKTR Industries VK-1PW CA Compliant 5.56x45mm 13.70" Rifle, Black - Precision with High-Performance - V-3110-0916-620-CA

    VKTR Industries VK-1PW CA Compliant 5.56x45mm 13.70" Rifle, Black - Precision with High-Performance - V-3110-0916-620-CA

    $2,399.00
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  22. Maxim Defense Industries MD15L 5.56x45mm 16" AR Rifle, Bazooka Green - MXM49736

    Maxim Defense Industries MD15L 5.56x45mm 16" AR Rifle, Bazooka Green - MXM49736

    Regular Price $1,650.99 Special Price $1,499.99
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  23. VKTR Industries VK-1PW CA Compliant 5.56x45mm 13.70" Rifle, Black - High-Performance with Precision and Sleek - V-3110-0916-604-CA

    VKTR Industries VK-1PW CA Compliant 5.56x45mm 13.70" Rifle, Black - High-Performance with Precision and Sleek - V-3110-0916-604-CA

    $2,399.00
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  24. Diamondback Firearms DB15 5.56x45mm 16" AR Rifle, Black - DB1784K001

    Diamondback Firearms DB15 5.56x45mm 16" AR Rifle, Black - DB1784K001

    Regular Price $1,074.99 Special Price $967.99
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  1. Rifles 2053
  2. Pistols 874
  3. Uppers 1377
  4. Kits 747
  5. Lower Receivers 774
  6. Parts 9248
  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.