AR-15 Extended Quad Rail Handguard with FSP Cutout | Carbine Length | Drop-in

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100% Risk Free, Lifetime Warranty

The Monstrum Tactical drop-in AR-15 extended quad rail handguard with FSP cutout is a quick and easy install on any carbine length AR-15 rifle platform. It allows for the mounting of tactical accessories such as bipods, flashlights, and sights. The unique forward extension installs in place around your front sight post and provides for added rail space for accessory or hand placement.

Please note that the Extended Carbine Length Quad Rail with FSP Cutout will not fit on Ruger AR-556 model rifles without modification. For more details, please read the following: Quad Rail with A2 FSP Cutout Modified for Ruger AR-556.

Before purchasing and installation, we recommend viewing our installation guides.

  • Includes: Top Rail section, Bottom front rail section, Bottom rear rail section, 8 Allen Screws, Allen wrench
  • Materials: 6061 Aluminum Alloy
  • Compatibility: AR-15 Rifle with delta ring and front end cap installed. Will not fit on Ruger AR-556.
  • Weight: 18 oz
  • Length: 10.5 in
  • Height: 2.5 in
  • Internal Diameter: 1.38 in
  • Color: Black or Flat Dark Earth
  • Warranty: Lifetime

6 Reviews Hide Reviews Show Reviews

  • Extended Quad Rail Handguard

    Posted by Scott on Feb 26th 2019

    Fits very well. 3 piece design. Comes with an installation hex tool for the hex screws. Looks good, fits tight and is functional. Ordered the 11 inch ladder covers that round out the look and feel. Great job Monstrum.

  • Great

    Posted by John on Feb 15th 2019

    Tried this handguard on an older build. Installation was a breeze. Fit is excellent. FDE color matched. Shipping and customer service were on point.

    I hesitated at first because some of the photos make it look like the lower portion of the handguard, forward of the FSB is lower. Once installed it lines up perfectly with the rear rail section. It's just that the rear section normally secures to the front mounting ring on the FSB, so it doesn't go as short as shown. Look at the one with it mounted, that's accurate. I think the photo should be replaced by the company. Additionally there is a cutout for a standard bayonet mount (it wont be useable as a bayonet mount, but it doesn't get in the way when installed properly). Hope this description helps.

    If you're looking for a drop in quad rail handguard, to fit onto a build with a carbine length FSB, in black or FDE, this is perfect, and priced perfectly.

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