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

Be the first to review

Out of Stock

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.

Orders will Ship within 1 Business Day
Backed by the AT3 Lifetime Warranty!
TOP ADD-ON'S
Black Warhammer with BCG

AT3™ Black Nitride 5.56 Bolt Carrier Group with Breek Arms Warhammer AR-15 Charging Handle

$129.94

AT3™ 5.56 NATO Government Profile 10.5 Inch AR-15 Barrel

$112.50

AT3™ 300 Blackout Medium Profile 7.5 Inch AR-15 Barrel

$105.00

AT3™ AT-15 SPEAR XL Billet Builder Set

Transform your AR build with the suppressor-ready AT3 SPEAR XL Builder Set. This complete kit pairs our billet 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 Spear XL AT-15 Receiver Set - OD Green

 

Durable Construction and Finishes

  • Forged 6061-T6 billet 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™ AT-15 SPEAR XL Billet Builder Set - Anodized and Cerakote

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 Spear XL AT-15 Builder Set - OD Green

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: 6061-T6 billet aluminum
    • Weight: 7.1 oz
    • Feedramps: M4 Feedramps
  • Handguard
    • Handguard Material: 6061-T6 Aluminum
    • Handguard inside diameter: 1.35”
    • Barrel Nut Material: 7075-T6 Aluminum
    • Barrel nut inside diameter: 1.02” (compatible with barrels up to 1” diameter)
    • Weight
      • 12″ Handguard – 10.9 oz
      • 15″ Handguard – 11.9 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.

Leave your review
Rating

Customers who viewed this item also viewed these products

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

AT3™ AT-15 SPEAR XL Forged Suppressor Ready Builder Set -...

(1)
$323.49
AT3™ AT-15 SPEAR XL Forged Builder Set Transform your AR build with the suppressor-ready
AT3 Tactical AT-15 M-LOK Builder Set - Lower, Upper, and SPEAR M-LOK Handguard

AT3™ AT-15 M-LOK Builder Set - Anodized and Cerakote

(7)
$260.99
AT3 Tactical AR-15 M-LOK Builder Set Get your custom Cerakote AR build started with
AT3 Tactical AT-15 Quad Rail Builder Set - Lower, Upper, and Pro Quad Rail Handguard

AT3™ AT-15 Quad Rail Builder Set - Anodized and Cerakote

(5)
$264.99
AT3 Tactical AR-15 Cerakote Quad Rail Builder Set Start your next AR build build

AT3™ AT-15 Lower and Upper Receiver Set - Anodized and...

(1)
$189.99
AT3 Tactical AR-15 Stripped Cerakote Upper and Lower Set The AT-15 Receiver Set includes
AT3™ Forged Upper Receiver and SPEAR XL Suppressor Ready Handguard Combo

AT3™ Forged Upper Receiver and SPEAR XL Suppressor Ready Handguard...

(2)
$221.99
AT3 SPEAR XL M-LOK Suppressor Ready Handguard with Forged Upper This suppressor-ready AR-15 handguard
AT3™ Slick Side Upper Receiver and SPEAR XL Suppressor Ready Handguard Combo

AT3™ Slick Side Upper Receiver and SPEAR XL Suppressor Ready...

(1)
$229.99
AT3 SPEAR XL M-LOK Suppressor Ready Handguard with Slick Side Upper This suppressor-ready handguard
AT3 AR-15 Billet Upper and M-LOK Handguard with Cerakote Finishes - 7 Colors

AT3™ AR-15 Upper Receiver and SPEAR Handguard Combo

(158)
$169.99
Getting Started on Your Next Build? Go Sleek and Lightweight with our Billet Upper
AT3™ SPEAR XL AR-15 M-LOK Suppressor Ready Handguard

AT3™ SPEAR XL Suppressor Ready Free Float AR-15 Handguard -...

(33)
$159.99
The AT3™ SPEAR XL M-LOK Handguard is Suppressor Ready, Light Weight, and Easy to
AT3 Tactical AT-15 Lower Receiver - AR-15 Stripped Lower Receivers

AT3™ AT-15 Stripped Lower Receiver - Anodized and Cerakote

(9)
$99.99
AT3 Tactical AR-15 Cerakote Stripped Lower Receiver The AT-15 is the AT3 Tactical take

AT3™ Forged Upper Receiver and SPEAR Handguard Combo

(15)
$146.99
AT3 M-LOK Handguard with Forged AR Upper Combo Build your rifle the way you
AT3 Alternator AR-15 Pistol

AT3™ AT-15 ALTERNATOR Pistol 10.5 Inch .300 Blackout Barrel -...

$1,099.99
AT3 Tactical ALTERNATOR .300 BLK Pistol – The Ideal Defense The ALTERNATOR .300 BLK
AT3 Spear M-LOK Handguard with Cerakote Finishes - 7 Colors

AT3™ SPEAR Free Float AR-15 Handguard – 9, 12, &...

(691)
$99.99
The AT3 SPEAR™ is our best, most secure handguard. Simple to install, lightweight, and
Aero Precision M5 16" Complete AR10 MLOK Free-Float Upper - .308 WIN

Aero Precision M5 16" Assembled AR-10 MLOK Free-Float Upper -...

(2)
$699.99
Aero Precision M5 16″ Complete AR10 MLOK Free-Float Upper – .308 WIN The Aero
UTG PRO AR-15 Billet Receiver Set

UTG PRO AR-15 Billet Receiver Set

(1)
$279.97
UTG PRO AR-15 Billet Receiver Set: Premium USA-Made Foundation for Custom Builds The UTG
AT3™ AT-15 Lower and Upper Receiver Set - Raw Finish

AT3™ AT-15 Lower and Upper Receiver Set - Raw Aluminum...

$189.99
AT3 Tactical AR-15 Stripped Raw Upper and Lower Set The AT-15 Receiver Set includes

Frequently purchased together

Strike Industries Ultimate AR-10 Dust Cover

$15.95
Strike Industries Ultimate AR-10 Dust Cover: Uncompromising Protection Elevate your AR-10 with the Strike
BRV-1082-B5-Systems-AR15-Stock-Black-600x600

B5 Systems Bravo AR-15 Stock - Mil-Spec

(8)
$57.95
B5 Bravo Stock – Enhanced Cheekweld Stock Streamlined for users who want optimal performance

AT3™ MOTHERFU-BAG™ - The BIG AR-15 Lost Parts Kit -...

(30)
$21.49
Launch a detent?  Snap a spring?  Don’t get mad, just fix it with this

AT3 Tactical Standard GI AR-15 Charging Handle - 9 Colors...

(49)
$18.99
Classic Mil-Spec Charging Handle – Light and Strong – A Great Value Easily chamber
Angled Foregrip: M-LOK Handguards for AR-15

Magpul AFG Angled Grip – M-LOK - 9 Colors Available...

(82)
Maximize Accuracy with Ultimate Control and Precision! The Magpul M-LOK AFG (Angled Fore Grip)
Magpul Moe Grip for Pistol Grip

Magpul MOE Pistol Grip for AR-15 – MAG415

(104)
Unparalleled Feel And Quality – Amazingly Affordable The Magpul Moe Grip is a top-notch

AT3™ Mil Spec AR-15 Buffer Tube - 9 Colors Available

(110)
$17.99
Mil-Spec AR-15 Carbine Buffer Tube Made 6061-T6 aluminum construction with a black anodized finish,

AT3™ Pro-Builder™ AR-15 Lower Parts Kit - No Grip or...

(108)
$29.99
Perfect Lower Parts Kit for the Premium Builds This quality lower parts kit excludes

AT3™ FU-BAG™ AR-15 Lost Parts Kit - Springs, Detents, Replacement...

(503)
$8.49
Made an “Oops” with your New Build?  You Detent-Launchin’, Spring-Losin’ Fool, you. We’ve all

Questions & Answers

Don't see the answer
you're looking for?

Loading questions...