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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

Magazines
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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  1. DPMS AR-15 SBA3 Pistol Lower Build Kit MOE Grip & Polished Trigger

    DPMS AR-15 SBA3 Pistol Lower Build Kit MOE Grip & Polished Trigger

    $179.99
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  2. DPMS Quad-Rail 16" 5.56 1:7 Nitride Upper

    DPMS Quad-Rail 16" 5.56 1:7 Nitride Upper

    Rating:
    100%
    (1)
    Regular Price $449.99 Special Price $429.99
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  3. Sinclair International .257 Roberts +P/.338 Cal 40 deg Shoulder Bump Gauge Insert

    Sinclair International .257 Roberts +P/.338 Cal 40 deg Shoulder Bump Gauge Insert

    $9.99
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  4. Sinclair International .264 Win Mag/.225 Winchester 25 deg Shoulder Bump Gauge Insert

    Sinclair International .264 Win Mag/.225 Winchester 25 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  5. Sinclair International .20 Nosler 30 deg Shoulder Bump Gauge Insert

    Sinclair International .20 Nosler 30 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  6. Sinclair International .22-250 Ackley Improved/6mm 40 deg Shoulder Bump Gauge Insert

    Sinclair International .22-250 Ackley Improved/6mm 40 deg Shoulder Bump Gauge Insert

    Regular Price $9.99 Special Price $8.79
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  7. Sinclair International .300 Remington Ultra Magnum 30 deg Shoulder Bump Gauge Insert

    Sinclair International .300 Remington Ultra Magnum 30 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  8. Sinclair International 6.8 SPC 23 deg Shoulder Bump Gauge Insert

    Sinclair International 6.8 SPC 23 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  9. Sinclair International .30 Cal 45 deg Shoulder Bump Gauge Insert

    Sinclair International .30 Cal 45 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  10. Sinclair International .338 Federal/.338 Lapua Magnum 20 deg Shoulder Bump Gauge Insert

    Sinclair International .338 Federal/.338 Lapua Magnum 20 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  11. Sinclair International .243 Winchester/.308 Win 20 deg Shoulder Bump Gauge Insert

    Sinclair International .243 Winchester/.308 Win 20 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  12. Sinclair International .27 Nosler/.26 Nosler 35 deg Shoulder Bump Gauge Insert

    Sinclair International .27 Nosler/.26 Nosler 35 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  13. Sinclair International .25-06 Remington 17 deg Shoulder Bump Gauge Insert

    Sinclair International .25-06 Remington 17 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  14. Sinclair International .220 Swift 21 deg Shoulder Bump Gauge Insert

    Sinclair International .220 Swift 21 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  15. Sinclair International 6mm Remington 26 deg Shoulder Bump Gauge Insert

    Sinclair International 6mm Remington 26 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  16. Sinclair International .17 Remington/5.56x45mm 23 deg Shoulder Bump Gauge Insert

    Sinclair International .17 Remington/5.56x45mm 23 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  17. Sinclair International .22-250 Remington/.223 WSSM/.243 WSSM/6.5mm 28 deg Shoulder Bump Gauge Insert

    Sinclair International .22-250 Remington/.223 WSSM/.243 WSSM/6.5mm 28 deg Shoulder Bump Gauge Insert

    Regular Price $12.99 Special Price $10.99
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  18. Sinclair International .17 Cal/.22 Cal Bullet Seating Depth Gauge w/Standard Guide

    Sinclair International .17 Cal/.22 Cal Bullet Seating Depth Gauge w/Standard Guide

    Regular Price $32.99 Special Price $29.29
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  19. Brownells 5.56x45mm Field Headspace Gauge

    Brownells 5.56x45mm Field Headspace Gauge

    Regular Price $35.99 Special Price $31.99
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  20. DPMS DR-15 Oracle II Slick Side 16" 5.56 NATO M-Lok Upper

    DPMS DR-15 Oracle II Slick Side 16" 5.56 NATO M-Lok Upper

    $349.99
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  21. PSA JAKL-15 300 Blackout Bolt & Bolt Carrier Assembly

    PSA JAKL-15 300 Blackout Bolt & Bolt Carrier Assembly

    $249.99
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  22. PSA JAKL-15 5.56 PISTOL BOLT & BOLT CARRIER ASSEMBLY - 10.5" BARREL

    PSA JAKL-15 5.56 PISTOL BOLT & BOLT CARRIER ASSEMBLY - 10.5" BARREL

    $249.99
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  23. PSA JAKL-9 Bolt & Bolt Carrier AssemblyPSA JAKL-9 9mm Bolt & Bolt Carrier Assembly

    PSA JAKL-9 Bolt & Bolt Carrier AssemblyPSA JAKL-9 9mm Bolt & Bolt Carrier Assembly

    $199.99
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  24. LMT Defense MRP-L M-LOK Railed Upper 5.56x45mm/.300 AAC Blackout/6.8 SPC no BCG&CH, Black

    LMT Defense MRP-L M-LOK Railed Upper 5.56x45mm/.300 AAC Blackout/6.8 SPC no BCG&CH, Black

    $716.99
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  1. Rifles 2064
  2. Pistols 887
  3. Uppers 1360
  4. Kits 757
  5. Lower Receivers 713
  6. Parts 9220
  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.