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AT3™ M Lok Handguard | Spear M-Lok for AR-15 – 9, 12, & 15 inch Lengths
Lifetime WarrantyOn All AT3 Brand Products
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.
Fast & Free Shipping On orders over $50
You will receive fast, free shipping for all orders over $50
Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.
Most orders received by 1pm CST ship the same day
You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.
The AT3 SPEAR™ is our best, most secure handguard. Simple to install, lightweight, and easy on the wallet.
The slim free-float design enhances accuracy while minimizing the weight of your rifle. M-LOK attachment slots and included rail section provide unlimited options for accessorizing your build. And with an available Billet Upper to perfectly match the slim profile, the SPEAR (Slim Profile Ergonomic Adjustable Rail) creates a unique look to set your rifle apart.
With 9″, 12”, or 15” lengths available, the SPEAR handguard is ideal for customizing your next AR-15 build, or upgrading an existing rifle. If you’re starting from a stock rifle, make sure you purchase a Low Profile Gas Block with the handguard.
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 AR-15 flat-top upper receivers, both forged and our AT3 Billet Upper
- Handguard uses screws to clamp around the barrel nut, with anti-rotation tabs and anti-slip screws that ensure a rock-solid lockup
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 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
Exceptional Fit and Finish
- Durable matte-black anodized finish resists scratches and provides 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
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 box:
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.
- Rifle Type: AR-15 (If you have a .308 AR variant, check out our AR-10 / .308 page)
- Material: 6061 Aircraft Aluminum
- Included Rail Sections: One Aluminum Picatinny Rail Section – 1 3/4” Length, 5 slots
- Finish: Hard-coat anodized (matte black)
- Handguard inside diameter: 1 3/8”
- Barrel nut inside diameter: 1.02” (compatible with barrels up to 1” diameter)
- 9″ Handguard – 8.3 oz (handguard only) / 9.9 oz (with hardware)
- 12″ Handguard – 9.3 oz (handguard only) / 10.9oz (with hardware)
- 15″ Handguard – 10.3oz (handguard only) / 11.9oz (with hardware)
- Actual Handguard Length
- 9″ – 9.25″
- 12″ – 12.0″
- 15″ – 15.0″
Frequently Asked Questions:
Will this fit my AR-15?
The SPEAR is specially designed for use with our matching Billet Upper Receiver as well as the majority of mil-spec AR-15’s on the market. In most instances, it will also require the use of a low-profile gas block that fits underneath the rail.
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.
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.
Want to see the SPEAR in action? Check out 704 Tactical’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)
Have Questions About this Product?
Frequently Bought Together
Fast shipping and easy installation. Works like it says it does. Prices are really good. Why pay more that need to, for it works equally as well as others.
I am very pleased with my purchase. I would definitly buy again! Recomend for anyone unsure.
I could not be happier. Lite, super solid, easy to install, and tough looking. I gotta say I was definitely blown away with this Handguard. First purchase from AT3, along with a gas tube and block. My AR is extremely lite, very functional, and aesthetically pleasing. VERY good value for the purchase. I will definitely buy again on my next build!
Bought an Ruger AR556 in Flat Dark Earth. Quickly realized i wanted M-Lock and found AT3 online.
Read lots of the reviews and finally ordered the 12 inch. Excellent fit and finish. Great quality and craftsmanship.
It went together easily and and i couldn't be more pleased.
Just replaced my old beat up Trinity Force handguard w/a really nice Spear handguard from AT3 Tactical. Wow, the lock up is tight as my Leapers
UTG PRO and that says a lot. Easy install and the finish is even and smooth. 3 times better than a $300 rail system because it's 3 times cheaper and just as nice as Midwestern Industry or any I've used or seen. I'm impressed because I got it for a 7.62x39 AR build for a steel eating beater but now it looks better than my other ar. It looks mean and is rugged and the piccatini rail matched up flush. Just WOW! Thanks Guys!!!!