Dirty Bird AR-15 SMRS Handguard - Slim M-LOK Rail System

SKU# dbi-ar15-hg-smrs-95-bk | by Dirty Bird Industries
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The SMRS (Slim M-LOK Rail System) by Dirty Bird Industries is a high quality and feature packed M-LOK hanguard designed for AR15 platform rifles and pistols. When designing this handguard, the team started from a basic set of requirements: The handguard must be tough, versatile, practical and have a straight forward install. 


  • Machined from aircraft grade 6061-T6 aluminum extrusions.
  • Anti-rotation tabs.
  • Type 3 hard anodizing or Cerakote™ sprayed at 1 mil thickness per spec.


  • M-LOK attachment slots on all sides (except top)
  • 1913 Picatinny top rail with shaved and beveled center section.
  • Raised QD attachment points at the 3 and 9 o'clock positions.
  • Snag free design with smooth, uniform octagonal surface ideal for accessory attachment or application of specialty coatings or patterns.


  • Aircraft Grade aluminum barrel nut. In our tests, the aluminum barrel nuts are just as effective when torqued to spec. Additionally, the weight savings enable us to utilize a longer barrel nut design which means more surface area at the attachment point without adding unnecessary weight.
  • Compatible with most known low profile gas blocks.

Straight Forward Installation

  • No frills clamp-on style installation using only a 1-3/16 Crow's Foot wrench and 5/32" Allen key
  • Barrel nut does not requiring timing with the gas tube. No shims required.

The end result is a great looking, zero compromise handguard suitable for a wide variety of builds.  

Made in the USA

Dirty Bird Industries' Limited Lifetime Warranty 

Available Colors

Black, Magpul™ FDE, Magpul™ OD Green, Midnight Bronze

Interior Diameter

1.35" ID

1.7" Maximum Vertical ID (for considering vertical height of gas blocks)

Weight (including mounting hardware)

9.5" - 9oz 

13.5" - 11.4oz

15" - 12.4oz

Customer Reviews

Based on 4 reviews
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Evan D.
United States

Great looking handguard

Super easy to install, looks and feels great. Nice, slim design. Mates well with Aero upper.

Evan D. verified customer review of Dirty Bird AR-15 SMRS Handguard - Slim M-LOK Rail System
Bryan N.
United States

Bargain price but not a bargain look!

Excellent fitment and incredible look to an Anderson upper! Love it!!

Ronnie C.
United States

Dirty Bird AR-15 SMRS Handguard Slim M-Lok Rail System

Great very nice, easy to install I highly recommend it

christopher l.
United States

5 stars is overrated.

Most of the time when you see a 5 star rating on a product it is some paid bot writing it. I give this product a 4 because of that. The price paid vs the overall quality of construction is the perfect alternative to the severely overpriced "name brands" available to the consumer.

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