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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

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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%
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    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%
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    Regular Price $866.99 Special Price $649.99
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  1. OBSIDIAN ARMS 8-Piece Professional Drive Pin Punch Set, Black

    OBSIDIAN ARMS 8-Piece Professional Drive Pin Punch Set, Black

    Regular Price $47.99 Special Price $42.99
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  2. Swab-Its .22 Cal/.17 Cal Star Chamber Cleaning Swab

    Swab-Its .22 Cal/.17 Cal Star Chamber Cleaning Swab

    Regular Price $13.99 Special Price $12.09
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  3. ALG Defense Inc Barrel Nut Wrench, Silver

    ALG Defense Inc Barrel Nut Wrench, Silver

    Regular Price $6.99 Special Price $5.99
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  4. TCS #8-32 x 5/16-27 16" AR Upper Receiver and Buffer Tube Rod

    TCS #8-32 x 5/16-27 16" AR Upper Receiver and Buffer Tube Rod

    Regular Price $40.99 Special Price $36.09
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  5. TCS 5/16-27 .223 Cal/5.56x45mm AR-15 Bore Guide

    TCS 5/16-27 .223 Cal/5.56x45mm AR-15 Bore Guide

    Regular Price $35.99 Special Price $32.69
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  6. TEKMAT AR15 OD 36" x 12" x 0.13" Gun Cleaning Mat, OD Green

    TEKMAT AR15 OD 36" x 12" x 0.13" Gun Cleaning Mat, OD Green

    Rating:
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    Regular Price $16.99 Special Price $14.99
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  7. Rotor Clip AR-15 Ejection Cover Hinge Pin Clip Tool

    Rotor Clip AR-15 Ejection Cover Hinge Pin Clip Tool

    Regular Price $61.99 Special Price $55.99
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  8. Magna-Matic Defense .223 Cal/5.56x45mm Carbon Removal Tool

    Magna-Matic Defense .223 Cal/5.56x45mm Carbon Removal Tool

    Regular Price $45.99 Special Price $40.99
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  9. Faxon Firearms 16" 338 ARC Gunner Pistol Length Barrel

    Faxon Firearms 16" 338 ARC Gunner Pistol Length Barrel

    Regular Price $255.99 Special Price $229.99
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  10. H&R 30 Round Magazine, Woodland Camo

    H&R 30 Round Magazine, Woodland Camo

    Rating:
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    $39.99
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  11. DPMS "Kitty Kat" 7.5" 300AAC 6.5" Quad-Rail Upper w/ BCG & CH

    DPMS "Kitty Kat" 7.5" 300AAC 6.5" Quad-Rail Upper w/ BCG & CH

    Rating:
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    $449.99
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  12. DPMS Quad-Rail 10.5" 5.56 1:7 Nitride Upper w/ BCG and CH

    DPMS Quad-Rail 10.5" 5.56 1:7 Nitride Upper w/ BCG and CH

    $409.99
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  13. DPMS CAR-15 Lower Build Kit - ODG

    DPMS CAR-15 Lower Build Kit - ODG

    Rating:
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    $99.99
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  14. DPMS Lower Parts Kit, No FCG, Grip, Stock

    DPMS Lower Parts Kit, No FCG, Grip, Stock

    Rating:
    96%
    (15)
    Regular Price $34.99 Special Price $30.99
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  15. DPMS Quad-Rail 16" 5.56 1:7 Nitride Upper

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

    Rating:
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    Regular Price $449.99 Special Price $429.99
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  16. 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

    Regular Price $12.99 Special Price $10.99
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  17. 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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  18. 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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  19. 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 $10.99 Special Price $9.99
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  20. 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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  21. 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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  22. 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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  23. 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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  24. 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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  1. Rifles 2104
  2. Pistols 932
  3. Uppers 1433
  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.