2A Armament

2A Armament Aethon Rail

  Since everyone has an AR15, or at least should, aftermarket accessories for them have become the norm. That brings us to 2A Armament. They produce a variety of products, including complete rifles, for the AR15. 2A sent me one of their 7" Aethon rail handguards with M-Lok slots.

  The Aethon rail has some interesting design features. The first one I noticed was the scalloped picatinny rail sections. Of course this helps to reduce weight, but also looks very nice. The Aethon features a full top rail, that lines up with the receiver nicely. Under the top picatinny rail there are lightening holes, which also help vent heat away from the barrel. At 90°, 180°, and 270° are the flats with the M-Lok slots. Since this is a 7" handguard, there are only 2 slots per side. In front and behind the M-Lok slots are holes for QD mounts! Between the flats on the handguard, 2A has reduced more weight by milling out an angled half circle style design. Also the top picatinny rail has "T" markings on it.

  Installation of the Aethon rail is pretty straight forward. I'll run you through the simple method. After taking off the old parts. Just install the 2A Armament titanium barrel nut per specified torque, line up one of the cut-outs for the gas tube and the barrel is tightened back on. I used my armorers wrench and it worked just fine. Now here is one of the niceties of the Aethon. To install the handguard, you just slide it over the barrel nut and align the top rail with your receiver. Then you just tighten down the four angled set screws, 2 per side, and your done. The way the barrel nut is designed, along with the angled set screws, is what makes this so easy. A warning, do not over tighten the set screws as they are going into aluminum and could possibly strip out fairly easy. I just put blue threadlocker on them and called it a day.

  The Aethon rail saw plenty of use. Partly because the rifle I installed it on, wasn't working properly. This had zero to do with the Aethon. I will say that because of the small internal diameter of the Aethon, it does get very warm when shooting quickly, so much that I wouldn't recommend it for a registered full auto, unless you always wear gloves. Other than that, the Aethon performed great. I liked the smaller diameter of the Aethon, it allowed me to get a good grip around it to help reduce muzzle jump. If you have really large hands, you could probably wrap them all the way around this handguard. Because this is a 7" handguard, it is very sturdy with no flex whatsoever. There are also no sharp edges anywhere, even where the set screws lock the handguard on. My only complaint is that it only measures 6.7" long instead of 7", leaving a little gap between the end of the handguard and the fixed front sight post. 

  2A Armament has done an excellent job with the Aethon handguard. It is a deep black anodizing, so much that it is much darker and shinier than my receiver. It is fairly lightweight and installs easily. If your in the market for some nice AR parts, go take a look at 2A Armament.

Firearms Insider Reviews - 8 Key Points

Claim to Fame:

Lightweight AR15 handguard

Target Market:

Users wanting a lighter weight, or M-Lok handguard

FNBs (Features & Benefits of this product):

  • Made in U.S.A
  • U.S.A. sourced 6AL-4V Titanium barrel nut
  • M-LOK mounting solution
  • Free floating design
  • QD mounts on both ends
  • 1.3” Internal Diameter
  • 6.7" length
  • "T" markings
  • Weighs 6.2 oz's complete

What other aesthetic options or finishes are available?

10", 12", and 15" lengths

What others are saying?:

None Found

Link to other reviews:

None Found

Price point:

MSRP = $179.00

Retail = $170.00 at Optics Planet

I need it now! Availability:

2A Armament or Optics Planet

Our Rating:


  • M-Lok

  • Easy Installation

  • Dark Anodizing

  • Small overall diameter

  • Full top rail

  • QD mounts


  • Not a full 7" in length

  • Gets hot

Score: 8.0 Great



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