Aero Precision Atlas S-One M-LOK Handguard

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Aero Precision Assembled Slick Side M4E1 Upper - No Forward Assist

Aero Precision Assembled Slick Side M4E1 Upper Receiver with No Forward Assist - Black


Aero Precision Assembled Slick Side M4E1 Upper - No Forward Assist

Aero Precision Assembled Slick Side M4E1 Upper Receiver with No Forward Assist - Flat Dark Earth


Slick Top M-LOK Handguard – Aero Precision ATLAS S-ONE

Aero Precision brings light weight and usability to the table with the ATLAS S-ONE M-LOK handguard. This handguard features a smooth top rail for an optimal c-clamp grip, M-LOK slots at the 3, 6, and 9 o’clock positions, with 3 sling swivel sockets and room for a backup iron sight at the front. This handguard is easy to handle, and looks perfect with Aero’s M4E1 or EPC-9 upper receivers.

The various lengths available are the actual length; measured from where the handguard meets the top of your upper receiver, to the very end of the handguard’s top rail.  No need to guess if one size will be the perfect fit for your barrel.  And you can color match with Magpul Flat Dark Earth, OD Green, Sniper Grey, and Burnt Bronze Cerakote options.

Innovative Taper Lock Attachment

The ATLAS (Aero Taper Lock Attachment System) gives the handguard its name, and a sleek attachment method.  The ATLAS uses 2 mirrored, tapered locking nuts that evenly distribute clamping force around the barrel nut with a turnbuckle screw.  The handguard also features a ratcheting detent, making the installation secure and preventing distortion during installation.

This handguard includes all the necessary hardware for installation, plus timing shims to provide perfect alignment with your receiver and gas tube.  As with all of Aero Precision’s products, the ATLAS S-ONE sets the standard for quality across the industry, and it’s all made in the USA.


  • Slick top for comfortable grip, with front rail for backup iron sights
  • Quick disconnect sling socket at the 3, 6 and 9 o’clock positions
  • Compatible with low profile gas blocks
  • 1.3″ Inside diameter
  • 1.5″ Outside diameter
  • Compatible with mil-spec AR-15 upper receivers, M4E1 threaded upper receivers, and EPC-9 threaded upper receivers.

Note: The ATLAS Handguards are NOT compatible with the M4E1 Enhanced Upper Receiver.  Use the M4E1 Threaded Upper for a fully matching look!


  • Material: 6061-T6 Aluminum
  • Finish
    • Anodized: Black, OD Green, Kodiak Brown
    • Cerakote: Magpul Flat Dark Earth, OD Green, or Sniper Grey
  • Handguard Weight
    • 7.3 inch: 4.86 oz
    • 9.3 inch: 5.47 oz
    • 10.3 inch: 6.0 oz
    • 12.7 inch: 7 oz
    • 15 inch: 7.95 oz
    • 16.6 inch: 8.3 oz
  • Hardware Weight: 1.9 oz
  • Inside Diameter: 1.3″
  • Outside Diameter: 1.5″

Products available on this page:

Have Questions About this Product?

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.

Aero Precision Warranty

If for any reason you have a warranty issue with one of our products, please contact us at 253-272-8188.

Please describe your situation, include your name and order number or transaction id. One of our technical specialists will then review your claim and contact you within 3-5 business days.

If you have images to send, please email them to

Damaged Items

In regards to claims dealing with damaged or blemished products, we ask that you create a Help Desk Ticket on your My Account page. If you don’t have an account with us, please go to the Contact Us page and fill out the form for review within 72 hours upon receiving the shipment.

If you have images to send, please email them to

Failed Background Check

There will be a 30% restocking fee on all lower receivers returned because of failed background checks.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 10 reviews
Steve Eickhoff
Atlas S Handguard

Nice Handguard.

The good: it looks great, is low profile and feels great. It's lightweight and anodized green to match my upper receiver. I can confirm that a Superlative Arms adjustable gas block fits under it with no contact. It's Aero, so it's high quality and solid.

The not great: you have to use shims to time the barrel nut. Not a big deal, but not really necessary. I used 2 and torqued to 45 and the gas tube lined up perfectly. I used a Criterion Core Series barrel which is thick at the base and makes the slimline QD holes useless since a QD will not sit deep enough to lock before contacting the barrel, so I had to add an M lock one. The green doesn't quite match my upper and buffer tube perfectly. It's more of a mat and less of a shiny/polished look. After about 200 rounds, the Handguard was becoming loose, and I had it about as tight as I could get it with the provided tool. Additionally, the last 4-6" of the Handguard was noticeably not the same color green as the rest of it, and it does not appear that it will ever be the same color again. Not a deal breaker but just things I've noticed.

Sonny Wong
Aero Precision Atlas S-One M-LOK Handguard

High quality hand guard. Super light, but durable! Solid barrel nut, and easy to install.

Zachary Mccoy
Great product

Fit and finish are perfect

Thank you for your positive feedback on the Aero Precision Atlas S-One M-LOK Handguard! We are thrilled to hear that you are pleased with the fit and finish of the product. We strive to provide top-quality products for our customers, and we are happy to know that we have met your expectations. Thank you for choosing Aero Precision.

Great handguard at a good price!

Everything came in perfect condition. Aero makes great gun parts!

Thanks for taking the time to share your feedback. We're glad we are satisfied with your purchase!

Great but heads up...

it really is an awesome rail. however, im not sure if its just mine or what but it was so tight on the barrel nut that i had to hammer it in place. this makes it difficult to align too. if it wasnt for that (and also wanting to prove im not a bot lol) id give it 5 stars. on the up side it definitely isnt going anywhere and that might be perfect for you!