AR-15 5.56/.223 14.5" Tactical Build Kit with Quadrail & LE Stock

Product Code:MAR-556-14-QUAD-KIT
Availability:In Stock
  • $389.95

  • $599.95

Available Options

AR-15 5.56/.223 14.5" Tactical Build Kit with Quadrail & LE Stock

AR-15 5.56/.223 14.5" Tactical Build Kit with Quadrail & LE Stock

Unlock your full potential with the AR-15 5.56/.223 14.5" Tactical Build Kit. This premium kit provides all the components needed to complete your AR-15 build, minus the 80% stripped lower receiver, making it an ideal choice for both novice and seasoned gun builders. Designed to meet Mil-Spec standards, this kit is crafted in the USA and ensures top-tier performance, reliability, and durability.


Key Features:

  • Caliber: 5.56 NATO / .223 Wylde – Designed to safely chamber both 5.56 NATO and .223 Remington ammunition, offering versatile shooting capabilities.

  • Barrel:

    • Length: 14.5”
    • Contour: M4 profile for superior balance and handling.
    • Material: Machined from 4150 Chrome Moly Vanadium Steel with a QPQ Corrosion Resistant Finish for enhanced durability.
    • Finish: Nitride-coated for increased wear resistance and longevity.
    • Twist Rate: 1:7 twist, ideal for stabilizing heavier projectiles.
    • M4 Feed Ramps for reliable feeding and cycling of ammunition.
    • Gas System: Carbine-length for consistent performance and reliability.
    • Threading: 1/2x28 for compatibility with various muzzle devices, including the A2 Flash Hider (included).
    • Gas Block Diameter: .750” for optimal gas flow.
  • Upper Receiver:

    • 7075-T6 Aluminum construction, machined to precise tolerances and hardcoat anodized to military specifications for superior strength and durability.
    • Flat Top for mounting optics and sights.
    • Forward Assist & Ejection Port Cover for enhanced reliability in adverse conditions.
  • Handguard:

    • Quadrail Free Float Tube (Carbine Length) – Made from aircraft-grade aluminum and hard coat anodized for maximum strength and weight reduction.
    • Provides plenty of space for attaching accessories like vertical grips, lights, and lasers.
  • Bolt Carrier Group (BCG):

    • M16 5.56/.223 BCG – Chrome-lined and crafted from 8620 steel, this BCG offers optimal performance and longevity.
    • The 9310 steel bolt is MPI tested to ensure reliable function and durability.
    • Comes complete with cam pin, firing pin, and firing pin retainer.
  • Lower Receiver Build Kit:

    • Classic AR-15 Lower Parts Kit – Mil-Spec components for turning your stripped lower into a fully functional lower receiver.
    • All essential parts included: trigger, hammer, selector, pins, springs, and more.
  • Stock:

    • M4 6-Position Adjustable Black Stock – Mil-Spec design with a buffer tube assembly and buffer spring, offering customizable length of pull for a comfortable and secure shooting position.

Why Choose the 14.5" Tactical Build Kit?

  • Versatile Performance: Chambered for both 5.56 NATO and .223 Wylde, allowing shooters to use a wide range of ammunition for diverse applications.
  • Precision Engineering: With a 1:7 twist barrel and Mil-Spec components, this kit offers exceptional accuracy and reliability for target shooting, tactical use, and hunting.
  • Durable Construction: The 4150 Chrome Moly Vanadium steel barrel and 7075-T6 aluminum upper ensure longevity and resistance to harsh conditions.
  • Customizable Build: The quadrail handguard offers ample space for mounting accessories, while the 6-position M4 stock provides an adaptable shooting experience.
  • Complete Mil-Spec Kit: All components adhere to military specifications for top-tier functionality and durability.

Included Components:

  • 14.5" Barrel (M4 Contour, Nitride Coated, 1:7 twist, 5.56 NATO/.223 Wylde chamber)
  • Flat Top Upper Receiver (7075-T6 Aluminum, Hardcoat Anodized)
  • Forward Assist & Ejection Port Cover (installed)
  • A2 Flash Hider (Threaded 1/2x28, crush washer included)
  • Carbine-Length Quadrail Free Float Tube (Aircraft-grade aluminum, Hardcoat Anodized)
  • M16 Bolt Carrier Group (Chrome-lined, MPI tested)
  • Charging Handle (Mil-Spec)
  • Mil-Spec Lower Parts Kit (Complete, for 80% Lower Receiver)
  • M4 6-Position Adjustable Black Stock (Mil-Spec)

Additional Notes:

  • Comes Unassembled: This kit is provided unassembled and does not include the 80% stripped lower receiver, which must be purchased separately.
  • Images may not be an exact representation of the product, as some parts may vary based on stock availability, but rest assured the quality remains top-tier.

Perfect for:

  • AR-15 enthusiasts looking to build their own rifle with top-tier components.
  • Tactical & competition shooters requiring precision, reliability, and durability.
  • Custom builds that allow for personalization with your preferred components.

Note: This rifle kit is not an FFL item – some machining is still required on the 80% Lower Receiver (not included).

Assemble your AR-15 with the 14.5" Tactical Build Kit to get premium performance and quality at an affordable price. With Mil-Spec components and precise engineering, your custom AR-15 will exceed expectations in reliability and performance.

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Tags: ar-15, 14.5" barrel, complete kit 5.56/.223, 14.5 14.5 14.5 14.5 14.5 14.5 14.5 14.5", tactical, build, with, quadrail, stock, line 14.5"

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