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AT3™ AT-15 SPEAR XL Forged Suppressor Ready Builder Set – Anodized and Cerakote

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This item is regulated, therefore your entire order will be shipped to an FFL dealer of your choosing. After you place your order, we will contact you to finalize these details.

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AT3™ AT-15 SPEAR XL Forged Builder Set

Transform your AR build with the suppressor-ready AT3 SPEAR XL Builder Set. This complete kit pairs our forged upper receiver with the SPEAR XL M-LOK handguard system, featuring a generous 1.74″ internal diameter that accommodates most suppressors while maintaining full M-LOK compatibility.

The 6061-T6 aluminum construction and steel barrel nut provide rock-solid durability while keeping weight to a minimum. Choose between 12″ and 15″ lengths to match your build requirements, with finishes available in classic black anodized, FDE, or ODG Cerakote to perfectly match your other AT3 components.

To get your rifle together, start with a lower parts kit, a buffer kit, a barrel of your choice, bolt carrier group, and charging handle. And as always, the pistol grip and stock that fits you best. If you’re looking for an even more robust, quad rail handguard, check out the AT-15 Quad Rail Builder Set. If you’re looking for more specific building needs, you can always choose a Stripped AT-15 Lower, or AT-15 Lower and Upper Set.

AT3™ AT-15 SPEAR XL Forged Builder Set - Anodized and Cerakote

Durable Construction and Finishes

  • Forged 7075-T6 Aluminum construction for tried-and-true toughness that won’t let you down
  • Cerakote in FDE, ODG, or a classic black anodized finish resist scratching and wear over time
  • Rigid 7075-T6 aluminum barrel nut provides the support your handguard needs for maintaining zero

AT3 Tactical SPEAR XL with Forged Upper Combo - FDE Closeup

Customizable with Cerakote

  • Compatible with all mil-spec AR-15 components and numerous upgrades like triggers, pistol grips, safety selectors, and more
  • Color coordinate your builds with AT3 parts – we use the same Cerakote colors for all finishes we offer on all AR parts
  • Attach accessories using the M-LOK system at 3, 6, and 9 o’clock position, plus a full length picatinny top rail!

Available Finishes

  • Black: Type 3 Hardcoat Anodized
  • Flat Dark Earth: H-267 Magpul® Flat Dark Earth
  • OD Green: H-232 Magpul® OD Green
  • Pink: H-224 SIG™ Pink
  • Burnt Bronze: H-148 Burnt Bronze
  • Tungsten: H-237 Tungsten
  • Titanium: H-170 Titanium
  • Red: H-167 USMC Red

AT3™ AT-15 SPEAR XL Forged Builder Set - Anodized and Cerakote

What’s Included

Specifications

  • Lower Receiver
    • Platform: AR-15
    • Material: Forged 7075-T6 Aluminum
    • Markings: “Cal Multi”, Pictogram Safety
    • Compatibility: Works with standard AR15 components and magazines
    • Weight: 8.35oz
  • Upper Receiver
    • Material: 7075-T6 forged aluminum
    • Weight: 7 oz
    • Feedramps: M4 Feedramps
  • Handguard
    • Handguard Material: 6061-T6 Aluminum
    • Handguard inside diameter: 1.35″
    • Handguard outside diameter: 1.93″
    • Barrel Nut Material: 7075-T6 Aluminum
    • Barrel nut inside diameter: 1.02″ (compatible with barrels up to 1″ diameter)
    • Included Rail Sections: One Aluminum Picatinny Rail Section – 1 3/4″ Length, 5 slots
    • Weight
      • 12″ Handguard – 12.5 oz
      • 15″ Handguard – 14 oz
  • Trigger Guard
    • Material: 6061-T6 Aluminum

FAQ

Is this lower Mil-Spec?

The AT-15 uses 7075-T6 aluminum construction, and is available in a type 3 hardcoat anodized finish, which are mil-spec. The AT-15 also accepts all mil-spec AR-15 components. Most triggers, pistol grips, lower parts, buffer tubes, and upper receivers will have no issue fitting into this receiver. With the Cerakote options, the thickness of finish in some areas may make the fit a bit tighter.

What is Cerakote?

Cerakote is a ceramic paint and adheres to polymer and metal very well. Since the the lowers are painted, some wear marks may be seen on areas of heavy use. AT3 doesn’t warranty against Cerakote inconsistencies or the wearing of coatings. Our parts are Cerakoted using the official Cerakote colors.

NOTE: Due to the circular shape of the SPEAR XL handguard, the Magpul Gen 2 MBUS Iron Sights are not able to slip onto the top Picatinny rail. However, the Magpul Gen 3 MBUS and other iron sights will fit onto the SPEAR XL with no issue.

Products available on this page:

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Customer Reviews

Based on 1 review
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B
Brandon Maitland
Great purchase!!!

I purchased the AT-15 Spear XL Forged Builder Set and I absolutely love it. It’s for a 50 Beowulf. I did run into a slight issue with the gas tube clearing the barrel nut so I couldn’t use the AT3 hand guard. Will eventually give it another try when the time permits. Nonetheless, my build came out perfect and looks great. Now I just need to get it to the range. And yes, I will be purchasing more in the future.

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