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AT3™ Slick Side Upper Receiver and SPEAR XL Suppressor Ready Handguard Combo

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AT3 SPEAR XL M-LOK Suppressor Ready Handguard with Slick Side Upper

This suppressor-ready handguard and billet AR-15 upper and  combo free-floats the barrel for accuracy and allows users to add a suppressor underneath the handguard. Mount lights, grips, and even laser modules where you need them with M-LOK attachment slots and a full-length top rail. All without compromising your rail’s real estate while running a silencer.

Available in 12” and 15” lengths, the SPEAR XL handguard is perfect for customizing your next AR-15 build or upgrading your existing rifle for suppressed shooting. This combination, paired with a high-quality upper receiver, ensures a seamless Picatinny top rail and optimal fit. If you’re starting from a stock rifle or building one, make sure you purchase a Low Profile Gas Block with the handguard or ensure your existing gas block will fit.

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

Lightweight & Suppressor Ready

  • Lightweight M-LOK design, with attachment, points at the 3, 6, & 9 o’clock positions and lightened Picatinny rail at the 12 o’clock position
  • Steel barrel nut with two-piece aluminum clamp ensures solid connection while reducing weight significantly
  • 1.74″ Internal Diameter accommodates most suppressors for 5.56, .300 Blackout, and More
  • Durable 6061 aircraft aluminum alloy construction – designed to take a beating
  • Picatinny top rail perfectly aligns with the included upper receiver
  • Billet Upper Receiver made of 6061-T6 aluminum
  • M4 Spec Feedramps
  • Low-profile brass deflector
  • Includes dust cover
  • No Forward Assist

AT3 Tactical SPEAR XL Suppressor Ready Handguard - Barrel Nut and Collar Closeup

Dead Simple Installation

  • Installs clean and secure with only a few simple steps – all you’ll need is a torque wrench, vise block, and vise.
  • This unique design requires minimal timing – with a range of 30 to 80 ft/lbs of torque, it’s easy to align the gas tube.
  • Perfect for assembling a new build or upgrading an existing rifle – it’s compatible with most upper receivers on the market
  • Once you’ve got it installed, you’ll have plenty of room for M-LOK accessories and adapters

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

Exceptional Fit and Finish

  • Choose from black anodized or Cerakote™ finishes that resist scratches and provide an attractive surface that matches the rest of your build
  • Vented top rail reduces weight and dissipates heat from shooting
  • Finger grooves down the length of the handguard provide a more ergonomic hold and a unique look
  • Fully dehorned and free of burrs and other sharp snag points
  • Proudly made in the USA
  • Backed by the AT3 Lifetime Warranty

More Information

Full Handguard kit – includes all mounting hardware, plus one M-LOK 5-Slot Rail section and barrel nut wrench.

Note: most rifle setups will require the use of a low profile gas block that sits under the handguard.

Included in the Box

Handguard with steel barrel nut, aluminum barrel nut collar and all mounting hardware, one 5-slot M-LOK to-Picatinny rail, hex wrenches for handguard and rail sections, barrel nut wrench, upper receiver, and dust cover.

Specifications

  • Rifle Type: AR-15 (If you have a .308 AR variant, check out our AR-10 / .308 page)
  • Handguard and Upper Receiver Material: 6061-T6 Aluminum
  • Finish
    • Black: Type 3 Hardcoat Anodized
    • Flat Dark Earth: H-267 Cerakote Magpul® Flat Dark Earth
    • OD Green: H-232 Cerakote Magpul® OD Green
  • Handguard inside diameter: 1.74”
  • Handguard outside diameter: 1.93″
  • Barrel Nut Material: Steel
  • Upper Receiver Pin Hole Diameter: .250
  • Included Rail Sections: One Aluminum Picatinny Rail Section – 1 3/4” Length, 5 slots
  • Weight
    • 12″ Handguard – 12.5oz
    • 15″ Handguard – 14oz
    • Upper Receiver – 7.1oz

Frequently Asked Questions

Will this fit my AR-15?

The SPEAR XL is designed for use with Forged Upper Receivers, our matching Billet Upper Receiver, and many other designs on the market. In most instances, it will also require the use of a low-profile gas block that fits underneath the rail. Piston systems may also be used, but check with the manufacturer first for exact dimensions.

This product will not work with non-milspec upper receivers like the Bushmaster Carbon due to the non-standard barrel threads.

We’re always glad to verify the fit for your rifle, just contact us! And if it doesn’t fit, we are glad to return it for you. And if you’re new to AR-15, we recommend watching a couple of the videos on our installation video page to understand how the process works.

Will this fit my Suppressor?

The SPEAR XL has a 1.74″ inside diameter, which will accommodate most suppressors for the AR-15. Typically, we recommend a 1.5″ diameter suppressor for use with this handguard, to ensure that the M-LOK slots are still able to be used surrounding the suppressor. Larger suppressors may have trouble fitting M-LOK accessories.

What tools and additional parts are required?

For parts – most setups will require a low profile gas block.

For tools – we recommend:

  • A vise and non-marring vise block for holding the upper
  • A torque wrench to ensure you stay in the AR-15 barrel nut torque range while timing the barrel nut (30-60 ft lbs)

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

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.

Questions & Answers

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