AT3™ AR-15 Upper Receiver and SPEAR Handguard Combo

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Getting Started on Your Next Build? Go Sleek and Lightweight with our Billet Upper and SPEAR M-LOK Handguard.

The slim free-float design of the SPEAR handguard enhances accuracy while minimizing the weight of your rifle, M-LOK attachment slots and included rail section provide unlimited options for accessorizing your build. Our billet upper matches the contours of the handguard perfectly, for a monolithic look in 3 different finishes.

With 12” or 15” lengths available, the SPEAR handguard is ideal for starting your next AR-15 build or upgrading an existing firearm. And with our selection of barrels, gas blocks, muzzle devices, bolt carrier groups, and charging handles, you can get the custom upper you need at the right price.

Lightweight & Durable

Slim and 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
Durable 6061 aircraft aluminum alloy construction – designed to take a beating
Picatinny top rail perfectly aligns with the included billet upper, with matching finish and lines for a monolithic look.
Handguard uses screws to clamp around the barrel nut, with anti-rotation tabs and anti-slip screws that ensure a rock-solid lockup

Anti-Rotation Tabs prevent shifting after taking hard impacts

The AT3 Spear handguard locks up solidly with the billet upper receiver

Easy to Install

Installs clean and secure with only a few simple steps – all you’ll need is a torque wrench, vise block, and vise. Click here to view our instructions.
Seriously, it’s easy. Torque down the barrel nut, slip the handguard over and tighten down the screws. No need for special plates or adhesives for a rock-solid fit
Perfect for assembling a new upper build – be sure to check out our selection of upper receiver components for completing a custom job!
Once you’ve got everything installed, you’ll have plenty of room for M-LOK accessories and adapters.

Exceptional Fit and Finish

Durable matte-black anodized or Cerakote finishes 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 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 combo:

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

Specifications

Rifle Type: AR-15 (If you have a .308 AR variant, check out our AR-10 / .308 page)
Handguard Material: 6061-T6 Aluminum
Finish
- 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
Handguard inside diameter: 1.35”
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
- 9″ Handguard – 9.9 oz
- 12″ Handguard – 10.9oz
- 15″ Handguard – 11.9oz
- Billet Upper – 7.1oz
Actual Handguard Length
- 9″ – 9.25″
- 12″ – 12.0″
- 15″ – 15.0″

Want to see the SPEAR and Upper Kit in action? Check out FreedomLover’s Review!

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 assure you stay in the AR-15 barrel nut torque range while timing the barrel nut (30-60 ft lbs)

Note: This product will not work with non-milspec upper receivers like the Bushmaster Carbon due to the non-standard barrel threads, and it is not compatible with most piston kits as they won’t fit under the handguard. Additionally, this rail will not work with gas blocks that are irregularly shaped or exceed 1.3 inches in height or width.

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.

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

This includes AT3 Red Dot Sights, Handguards, Iron 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.

4.8 162 reviews