Expo Arms® AR-15 Quad Rail Handguard - 12.55"

Manufactured by Expo Arms
Manufactured by Expo Arms
4 Reviews

In Stock

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The Expo Arms AR-15 Quad Rail is designed for those looking to build a heavy-duty carbine that can easily withstand hard use in any environment. This quad rail handguard is built using high-quality materials like 6061 aluminum for its lightweight yet durable properties and features a hardcoat anodized black finish for long-lasting protection from the elements. While M-LOK is the new go-to accessory attachment style for its light weight and quick modularity, full length picatinny rails still have their place. Picatinny is a tried and true attachment method that is less susceptible to loss of zero when mounting mission critical equipment like IR lasers and is still the preferred method for many professionals. This 12.55" model is perfect for a 13.9" pinned and welded barrel allowing you to get all the rail space that you need while giving you plenty of room for attaching your suppressor of choice. If your next build fits these requirements, then you can't go wrong with the Expo Arms AR-15 Quad Rail Free Float Handguard.

  • 12.55" Length perfect for a 13.9" barrel
  • 6061-T6 Aluminum construction
  • Black hardcoat anodized finish
  • Anti-rotation tabs
  • Compatible with Mil-Spec uppers
  • Includes barrel nut
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Accessory AttachmentM1913 Picatinny
BrandExpo Arms
FinishHardcoat Anodized
Gas System LengthMid-Length
Handguard Length12.55
MaterialAluminum - 6061-T6
TypeQuad Rail
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 www.P65Warnings.ca.gov.

Ratings & Reviews

4 reviews

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  • 1 star
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Great Value


For those that don’t know this is made by a small American Company. I won’t say their name because it will probably get removed but just know they have a good reputation in the AR community. This right here is a super quality rail for the price. The barrel nut is based off of a very well respected brands design. They then use their own locking system which they advertise on their website as being 17-4 stainless. This thing is definitely a stout well built rail. If it means anything I put this on a gun that is full Centurion parts minus this handguard. Will buy more of these

Solid Handguard for the price

by -

This was my 2nd choice next to the ~12.5 inch MI quad rail, but PA didn’t have it in the catalog. So I chose this and I’m very pleased with it. The material is sturdy, the barrel nut was solid and easy to install - only real complaint I have is that the lockup is 100% dependent on 2 small screws with no anti rotation plate. I haven’t put many rounds through the upper but so far so good with no major issues regarding the Handguard. As with any quad rail, this thing is heavy - keep that in mind when choosing a barrel (govt profile 14.5 barrel with a quad rail and a vortex Huey and this thing is heavy)

Sturdy, reliable and slim


As previous comments have said the locking mechanism that they use for their barrel nut is the same as a very reputable three letter brand made here in America. However, contrary to one of the comments that I’ve seen this rail does in fact, have antirotation tabs built into the rail and does not use a “plate” which is much more sturdy in my opinion. Even though it’s a quad rail, it’s slimmer than most designs which was another reason I chose it, weight be damned.

The look I was going for

by -

Not many quad rails due to everyone wanting the rounded bottom hand guards. But this was the perfect fit for me and the look I was going for. Easy install and tool for the barrel nut made torquing an ease.