13.7" RG2 M-LOK Handguard for AR-15

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Breek Arms' mission is to provide quality parts at competitive prices. Our newly developed RG2-S (Rigid Rail Mod2) Handguard line up is an evolution from our previous lineup. Our Patent Pending locking mechanism uses a wedge block system that puts equal pressure all the way around the barrel nut. This gives you better harmonics and a much stronger mounting solution especially when you're putting pressure on the end using a bipod or sling.

The Newly Released RG2 handguards were developed specifically for suppressor builds, each length is designed to fit common barrel length and leave room for all types of quick attach suppressor mounting solutions. The skeletonized design shaves as much weight as posssible without sacrificing the integrity of the handguard. All edges are chamfered, blasted, then Type 3 Hardcoat anodized for a smooth feel.


  • Patent Pending Rigid Rail System - 2 Piece Wedge Blocks Allow for a Rock Solid Attachment 
  • Fits AR-15 & M4 variants (223, 556, 9mm, & 300blk)
  • Fits Mil Spec Forged & Billet Style Uppers
  • Handguard & Wedge Blocks are Made From Aircraft Grade 6061-T6 Aluminum
  • Mil-Spec Type III Class 2 Hard Coat Anodize
  • Large Cutouts Made to Reduce Weight and Provide Ventilation
  • Slim-line, Smooth Handguard Profile
  • Magpul Licensed M-LOK Mounting System
  • Barrel Nut is Made From High Grade Steel & Coated
  • Proudly Made in the USA
  • Comes with our Breek Arms 1 Year Warranty

Advanced Specs

Handguard Length: 13.7 Inches

Total Weight w/ Barrel Nut: 12.4 Ounces

Barrel Nut Weight: 3.1 Ounces

Cutout Length (from longest point): 0.275 Inches

Inside Diameter (ID): 1.375 Inches

Front Outside Diameter (OD): 1.605 Inches

ID + Top Gas Tube Channel: 1.73 Inches

Gas Tube Channel Width: 0.475 Inches

Gas Block Compatibility: Low profile & adjustable low-profile gas blocks

Barrel Nut Wrench Size: 1 1/4"

Color: Black

Installation Instructions

  1. Torque barrel nut to 40 - 60 ft pounds 
  2. Anti-Seize on the barrel nut is not necessary but recommended
  3. Line the handguard top rail to the AR upper receiver rail for a seamless fit
  4. Install wedges and torque two 10/32 bolts to 60 inch pounds

See our FAQ page for common questions regarding handguards and other parts.

3 Reviews Hide Reviews Show Reviews

  • 4
    Solid handguard, QC issues?

    Posted by Ben W on Oct 26th 2021

    First off this handgaurd looks great. It’s fairly light for its size and I’m a big fan of the ports, specifically the covered ports at the end of the rail. Barrel nut uses an inch and a quarter wrench (not mentioned anywhere, even on the box) and the lockup is good. My only issue was a small gouge in the front of the handgaurd directly under the barrel. I’m pretty sure it didn’t happen in shipping as it’s been anodized over. It’s a big enough chunk missing that quality control should have spotted it but it shouldn’t affect anything so I guess it’s not that big of a deal.

  • 4
    13.7 M-Lok Handguard

    Posted by Daron Dyer on Sep 16th 2021

    Looks to be well made. Fit and finish are nice. Dealbreaker is it was sent in a bubble envelope. I won't be buying any more just for that. Luckily it made it OK, but I won't take that chance again. ------ Breek Arms Comment: We are glad to hear your product was delivered without any issues. We were delayed in getting our custom printed boxes, so the first few went out without the branded box packaging.

  • 5
    13.7” RG2

    Posted by Reign on Sep 16th 2021

    Love the C cut on this rail , lightweight, sits very nicely with my muzzle comp had not trouble installing everything fit material quality seems very sturdy. Will definitely be buying another rail soon.