1. Firearms
  3. Semi-Auto Rifles
  5. AR-15 Rifles

CORE 15 M4 223/5.56 DIRECT GAS IMPINGEMENT RIFLE

  • Item Number: 100278
  • /
  • View More Items by Core 15
  • /
  • Condition: NEW
Core 15
$699.99 $899.99

Temporarily Out of Stock

Includes FREE shipping
  • DANIEL DEFENSE DDM4 M4A1 5.56 NATO 14.5 IN BBL FDE FLASHIDER PERMANENTLY ATTACHED

    Daniel Defense M4A1 5.56 NATO AR-15 with MilSpec + Finish
  • ANDERSON MANUFACTURING COMPLETE OPEN TRIGGER LOWER 5.56MM

    Anderson Manufacturing Complete Open Trigger Assembled AR-15 Lower Receiver (Multi Cal)
    $181.00 $129.99

  • ANDERSON MANUFACTURING AM-15-STRIPPED LOWER RECEIVER MULTI CAL CLAM PACKAGED

    Anderson Manufacturing AM-15 223/5.56 Stripped Lower Receiver (In Clam Package)
    $82.00 $39.99

  • RUGER AR-556 5.56MM WITH M-LOK

    Ruger AR-556 5.56mm Semi-Automatic Rifle with M-LOK and Heavy Contour Barrel
    $1,039.00 $579.99

  • COLT CARBINE 5.56X45MM RIFLE WITH A2 GRIP

    Colt M4 Carbine 5.56x45 NATO CR6920 Series with Magpul Furniture
    $1,199.00 $1,029.00

  • RADICAL FIREARMS RF-15 SOCOM 5.56NATOAR-15 RIFLE WITH 15-INCH RPR FREE-FLOAT RAIL

    Radical Firearms RF-15 Socom 5.56 NATO AR-15 Rifle with 15-Inch RPR Free-Float Rail
    $685.00 $499.99

  • DANIEL DEFENSE DDM4 V7P 300 BLACKOUT PISTOL WITH PSB

    Daniel Defense DDM4 V7P 300 Blackout Semi-Automatic Pistol with Stabilizing Brace
  • DANIEL DEFENSE DDM4 V7 RATTLECAN 5.56MM NATO

    Daniel Defense DDM4 V7 Rattlecan 5.56mm NATO Semi-Auto Rifle
  • RADICAL FIREARMS RADICAL 5.56MM 16` BARREL WITH 15` FREE FLOAT RAIL ODG

    Radical Firearms FR16 5.56 NATO Rifle with M-LOK Handguard and OD Green Stock
    $449.99

  • RADICAL FIREARMS RF-15 SOCOM 5.56MM NATO AR-15 STYLE RIFLE

    Radical Firearms AR-15 SOCOM 5.56 NATO Rifle with MFT Furniture
    $685.00 $579.99

  • DANIEL DEFENSE DD4 M4A1 RIII 5.56 14. 5 IN BBL 32 RD MAG

    Daniel Defense M4A1 RIII 5.56mm Semi-Auto AR-15 Rifle with Fully-Ambidextrous Lower
  • GREAT LAKES FIREARMS 223/5.56MM SEMI-AUTOMATIC AR15 WITH TUNGSTEN CERAKOTE FINISH

    Great Lakes Firearms AR15 223 Wylde/5.56mm Semi-Automatic Rifle with Tungsten Cerakote Finish
    $529.99

  • PMC 223 Rem 55 gr FMJ BT Bronze 20/Box

    PMC 223 Rem 55 gr FMJ BT Bronze 20/Box
    $8.99
    ($0.45 / round)

  • Winchester 223 Remington 69 gr Matchking HPBT Competitive Target 20/Box

    Winchester 223 Remington 69 gr Matchking HPBT Competitive Target 20/Box
    $19.99
    ($1.00 / round)

  • Hornady 5.56 NATO 62 gr FMJ Frontier 20/Box

    Hornady 5.56 NATO 62 gr FMJ Frontier 20/Box
    $11.99
    ($0.60 / round)

  • PMC X-TAC 5.56mm NATO 62 gr M855 Green-Tip 20/Box

    PMC X-TAC 5.56mm NATO 62 gr M855 Green-Tip 20/Box
    $8.99
    ($0.45 / round)

  • Hornady 5.56 NATO 75 gr BTHP Match Frontier 20/Box

    Hornady 5.56 NATO 75 gr BTHP Match Frontier 20/Box
    $13.99
    ($0.70 / round)

  • Hornady 5.56 NATO 55 gr FMJ (M193) Frontier 20/Box

    Hornady 5.56 NATO 55 gr FMJ (M193) Frontier 20/Box
    $8.99
    ($0.45 / round)

  • Hornady 223 Rem 68 gr BTHP Match Frontier 20/Box

    Hornady 223 Rem 68 gr BTHP Match Frontier 20/Box
    $12.99
    ($0.65 / round)

  • Hornady 223 Rem 55 gr FMJ Frontier 20/Box

    Hornady 223 Rem 55 gr FMJ Frontier 20/Box
    $8.99
    ($0.45 / round)

  • PMC 5.56mm 55 gr FMJ-BT X-TAC 20/Box

    PMC 5.56mm 55 gr FMJ-BT X-TAC 20/Box
    $9.99
    ($0.50 / round)

  • Hornady 223 Rem 55 gr Hollow Point Match Frontier 20/Box

    Hornady 223 Rem 55 gr Hollow Point Match Frontier 20/Box
    $11.99
    ($0.60 / round)

  • Hornady 5.56 NATO 68 gr BTHP Match Frontier 20/Box

    Hornady 5.56 NATO 68 gr BTHP Match Frontier 20/Box
    $12.99
    ($0.65 / round)

  • Winchester 223 Rem 55 gr FMJ 20/Box

    Winchester 223 Rem 55 gr FMJ 20/Box
    $13.99
    ($0.70 / round)

  • MAGPUL PMAG 30 GEN M2 AR-15 556 NATO 30 RD MAG

    Magpul PMAG GEN M2 5.56mm 30-Round Black Magazine
    $12.95 $9.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD MAG

    Magpul PMAG GEN M3 5.56mm 30-Round Black Magazine
    $16.99

  • AMEND2 MOD 2 AR-15 5.56 MM 30 RD BLACK MAG

    Amend2 AR15/M4 Mod.2 5.56mm/223 Rem. 30-Round Magazine (Black)
    $14.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD WINDOW MAG

    Magpul PMAG GEN M3 5.56mm 30-Round Black Magazine with Window
    $17.99

  • MAGPUL PMAG 30 GEN M2 AR-15 556 NATO 30 RD WINDOW MAG

    Magpul PMAG GEN M2 5.56mm 30-Round Magazine with Window
    $15.99

  • MAGPUL PMAG 40 GEN M3 AR-15 556 NATO 40 RD MAG

    Magpul PMAG 40 AR/M4 GEN M3 5.56mm 40-Round Magazine
    $21.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD WINDOW MAG (TAN)

    Magpul PMAG GEN M3 5.56mm 30-Round Coyote Tan AR/M4 Magazine with Window
    $17.99

  • MAGPUL PMAG 20 GEN M3 AR-15 556 NATO 20 RD MAG

    Magpul PMAG GEN M3 5.56mm 20-Round Black Magazine
    $13.99

  • MAGPUL PMAG 10 GEN M3 AR-15 556 NATO 10 RD MAG

    Magpul PMAG GEN M3 5.56mm 10-Round AR-15 Magazine
    $14.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD MAG (TAN)

    Magpul PMAG GEN M3 5.56mm 30-Round Coyote Tan Magazine
    $16.99

  • DANIEL DEFENSE AR15 223 REM 32 ROUND 5.56 MAG BLACK

    Daniel Defense AR15 Magazine 223 REM 5.56 NATO 32 Round Factory Magazine Black
  • AMEND2 MOD 2 AR-15 556 30 RD FDE MAG

    Amend2 AR15/M4 Mod.2 5.56mm/223 Rem. 30-Round Magazine (Flat Dark Earth/FDE)
    $14.99 $8.99

Product Description

Built upon the same principles as Eugene Stoner’s original design, CORE15 uses the basic receivers for their AR-15 style rifles, and then expand upon that design by incorporating the many benefits of today’s accessories into their rifles. CORE15 holds each and every receiver to exacting tolerances using state of the art machining processes. By exceeding military standards, CORE15 ensures the best fit possible and can offer a more reliable, smoother functioning, and more accurate weapon that will provide you with the peace of mind that you deserve.

Whether a weekend shooter heading to the range for an afternoon of fun, or professional operator preparing for work, CORE15 Rifle Systems will provide you with the weapon to fit your individual needs.

Firearm Specifications

    • CORE15™ Mil-Spec Forged 7075-T6 Lower Receiver, Type III Class II Hard-coat anodized finish, beveled Magwell for improved reloading speed, machined chevrons in front strap, bullet pictogram safety markings
    • CORE15™ Mil-Spec Forged 7075-T6 M-4 Upper Receiver, Type III Class II Hard-coat anodized finish, M4 Feed Ramps, (1913 Picatinny rail flat top) w/ dry lube internal finish and laser engraved T-markings
    • 16” 4150 CMV Chrome Moly M4 Profile Chrome Lined Barrel 1:7 Twist
    • Chambered in .223/5.56 x 45 mm NATO
    • Direct Gas Impingement Gas System
    • Gas Tube made of 304 grade Stainless Steel
    • Chrome lined 8620 Stainless Steel Bolt Carrier and Bolt Carrier Key
    • Magnetic Particle Inspected (MPI) Carpenter 158® Bolt Assembly
    • A-2 Flash Hider
    • “F” Marked A Frame Front Sight Base (Forged)
    • M4 Style Thermoset molded Polymer Hand Guards with Dual Heat Shields
    • A-2 Pistol Grip
    • CORE15™ Six Position Retractable Stock
    • CORE15™ Hardcore Billet Charging Handle V.1
    • Magpul® 30 rd. PMAG®
    • CORE15™ Owner’s Manual
    • Weight (unloaded): 5.9 lbs.
    • CORE’s NO BS Lifetime Warranty

Customer Comments & Questions

Customer Reviews

Write a review
(5 out of 5) Dressed up
by Tim from Calmar, IA on January 18, 2020

Did a lot of furniture changes on my Core 15 100278. Shot great but wanted some improvements over stock. Optics and handgrips with a Nikon P223 scope first and a Magpul MOE grip second. Butt pad by Limbsaver, and many other small changes just improved the feel. It always fired perfectly. Once scoped in, it is one dependable rifle. Mainly for coyotes and an occasional unlucky woodchuck.

Back to top