Aero Precision ATLAS S-ONE M-LOK AR-15 Handguard Black - 12.5"

Manufactured by Aero Precision
SKU: APRA500104A
MPN: APRA500104A
Manufactured by Aero Precision
11 Reviews
Click Here for Price $149.99 $179.99

In Stock

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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The ATLAS S-ONE Handguard from Aero Precision is designed with a focus on size and weight reduction. Crafted from durable 6061-T6 aluminum, the S-ONE handguards are built to be lightweight without compromising strength. Featuring the proprietary Aero Taper Lock Attachment System (ATLAS), this handguard ensures a secure and reliable mounting platform. The system utilizes two tapered locking nuts and a custom engineered barrel nut, tightened with a turnbuckle screw. The design incorporates a ratcheting detent, enhancing installation precision and preventing distortion often observed with other mounting systems.

Aero Precision's ATLAS S-ONE Handguards offer a lightweight and durable solution for any AR-15 build, ensuring a secure attachment and optimal performance. Choose the desired length and take advantage of the versatile customization options that the M-LOK system provides. Elevate your shooting experience with Aero Precision's S-ONE Handguards.

Please note that the ATLAS S-ONE Handguards are not compatible with the Aero Precision M4E1 Enhanced Upper Receiver.


  • Compatible with MIL-SPEC AR-15 upper receivers and barrels
    6061-T6 aluminum construction
  • Front and rear picatinny rail sections for accessory attachment
  • Reduced weight by eliminating the center portion of the top rail
  • Indexing grooves in the 12 o'clock position for improved grip control
  • Quick disconnect sling sockets at the 3, 6, and 9 o'clock positions
  • Compatible with low profile gas blocks
  • 1.3" inside diameter for compatibility with a wide range of accessories
  • 1.5" outside diameter for a comfortable grip
  • Mounting hardware weight: 4.72 oz (consistent across all S-ONE Handguard options)
  • Includes barrel nut for easy installation
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Accessory AttachmentM-LOK
BrandAero Precision
FinishHardcoat Anodized
Gas System LengthRifle
Handguard Length12.5
Inner Diameter1.30 in
MaterialAluminum - 6061-T6
Weight11.72 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

11 reviews


So close and yet so far


This would be my favorite handguard if it weren't for the "pig of a barrel nut". The barrel nut is just this huge lump of steel that adds more weight to the unit than is necessary. It's like Aero Precision spent so much R&D time on the handguard itself that they just didn't have it in the budget to look at the barrel nut. WHAT A SHAME! So close Aero. You blew it.

I still bought two of these and am thinking about buying another- then I am going to machine my own barrel nuts to make up where Aero fell short. So sad.

Light, easy to install, great Aero quality...


Great rail. Rigid but light. Just be honest with yourself with the interrupted top rail. The front sight section is large enough for Magpul pro’s or a fixed sight, but that’s it. Great for uppers with LPVO. Easy to install, shims included.

Love the Atlas S-ONE M-LOK handguard!


No idea what the previous poster is talking about ... the barrel nut for the Atlas S-ONE M-LOK handguards are light as heck. Mine rocks. I really like the proprietary attachment system as well. Will most certainly order again.

Not actually 12".....


I was so excited to complete my 12.5 Grendel with this hand guard after handling a longer one at a gun show recently.
Come to find out, this thing is actually 12.56" instead of 12"
With the internal diameter being so slim, which is what I wanted, I can't get a can on my Griffin linear comp. Now I'm stuck with either buying a new, less slim or shorter hand guard or having a custom adapter made to mount a can.

They need to label this thing properly. Either call it a 12.5 or a 13...

Fantastic Aero Precision quality


Previous review mentioned they were upset at the overall length, well if you do your due diligence as any wise consumer should, it specifically states that the length is 12.5"...don't complain about something that is your own fault in not researching. As for the handguard itself, it's beautiful, lightweight, strong and very well made, just like all Aero Precision products!

Bad ass


They waited to long now we are in the clear they bring them out to late

Great product

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Lightweight feels good in the hand will get another for .450

Great Design, Quality, Very Slim & Light

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I've become a big fan of Aero Precision, as a manufacturer, as they just make excellent, yet still well priced items. This handguard is really nicely made, it's definitely limited to using low-profile gas blocks, not much room as it's a Slim design. The machining is excellent, smooth to hold, finish is perfect, definitely recommended!

Best value

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I use Aero Precision products on all my AR builds. I believe their parts are some of the best on the market. I particularly love the handguard for it's light weight and superior quality.

Aero Precision Atlas S-One

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Great price for a great product. Lightweight but still crazy solid!