Aero Precision Quantum M-LOK Handguard 12" - Black

Manufactured by Aero Precision
SKU: APRA400104C
MPN: APRA400104C
Manufactured by Aero Precision
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NOTE: Limit 5 per household. Quantities exceeding 5 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 3 business days or less. FFL orders take approximately 7 business days if you can provide us an actively receiving FFL location.



Note: This handguard is for use with the Aero M4E1 enhanced upper receiver and does not include a barrel nut.

If you are on the market for a lightweight minimalist handguard, the Aero Precision Quantum M-LOK handguard is the one for you. It features a smooth octagonal shape with M-LOK attachment points on every flat, so you can easily adapt this rail for any situation. The rigid M-LOK attachment system allows you to quickly rearrange rail sections, lights, grips, bipods, and more without the extra weight of full length rails. This free float handguard is made from 6061-T6 aluminum and has a hardcoat anodized black finish that can withstand harsh weather and hard use. The built in anti-rotation tabs combined with the proprietary locking system on the M4E1 enhanced upper receiver ensure that this rail won’t loosen over time. The slightly larger 1.78” inside diameter is designed to be used with most 1.5” suppressors and muzzle devices. The 12” length is also capable of fully covering mid-length gas systems as well as partially cover rifle length systems. The Aero Precision Quantum AR-15 handguard is the perfect addition to your M4E1 enhanced upper receiver.

  • Designed for use with M4E1 enhanced upper receiver (includes mounting hardware)
  • 12” 6061-T6 aluminum with hardcoat anodized black finish
  • 1-piece free float design
  • Built in anti-rotation tabs
  • 8 mounting surfaces with M-LOK attachment points
  • Compatible with low profile gas blocks and 1.5” suppressors
  • Includes 4-slot picatinny rail
  • Polymer front Magpul MBUS sights may require modification to the sight for installation

Included with the Quantum is a 4-slot picatinny rail attachment for the top muzzle end of the handguard. This allows you to install your favorite back up sights without fear of losing your zero. However, due to the profile, some sights like the Magpul MBUS may require slight modification for them to fit correctly. The screws need to install it to the enhanced upper are also included.

Aero Precision takes some of the most state of the art manufacturing techniques and equipment derived from their work in the aerospace industry and applies it to their products in the firearms industry. They have utilized their knowledge from years of building aircraft components to design and engineer AR-15 handguards, receiver sets, scope mounts, and more. They treat every product as if it were a precision flying machine and adhere to strict quality standards to ensure law enforcement, military, and civilian customers receive a product they can rely on.
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Accessory AttachmentM-LOK
FinishHardcoat Anodized
Gas System LengthRifle
Handguard Length12.00 in
Inner Diameter1.78
MaterialAluminum - 6061-T6
Weight11.2 oz.

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

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