Best Quad Rail for Ruger AR 556

Best Quad Rail for Ruger AR 556

A Comprehensive Guide

The quad rail is one of the most popular AR 556 accessories. It’s a great way to customize your weapon and make it fit your needs perfectly, but there are so many different kinds that choosing can be hard. The problem with the standard quad rail is that it’s not made to fit your rifle, or it may not be the best quad rail for Ruger AR 556. It doesn’t have enough space for a gun grip, and you can’t install an optic because there isn’t room for one. You want to mount accessories on your rifle, but you don’t want to settle for a cheap quad rail that doesn’t work well with your gun.

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We’ve compiled this guide to help you find the best quad rail for your AR 556. Our review considers all three types of quad rails available on the market today so that you can choose what works best for you. Let’s get started.

Table of Contents

If you are in a hurry to purchase the best quad rail for Ruger AR 556, and you want to make the best decision, here are our top 3 picks:

Top 3 Best Quad Rail for Ruger AR 556

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Types of Quad Rails

The three types of Quad Rails are Picatinny (also known as MIL-STD-1913 Rail), Keymod, and M-LOK. The quad rails lined up vertically along the top, back, and sides of a rifle or shotgun to add sights for aiming, lights for low light shooting situations (such as night hunting), and grips for recoil control.


The Picatinny rail system is the most popular type of rail. It utilizes slots or grooves spaced at uniform intervals to allow accessories, such as sights or flashlights, to be mounted perpendicular to the gun’s barrel. This allows for a large selection of accessories and easy removal without having to remove the rail itself.


A newer type of mounting system for firearms, Keymod is more modular than Picatinny rails because it uses a series of keyhole slots instead of one large slot. You can mount an accessory on several different elevated surfaces within a particular location.


It is a mounting system for firearms that uses small holes drilled into the rails, which allow accessories to be attached or detached without removing any rail sections. It allows shooters to customize their firearms with attachments such as grips and lights without disrupting shooting consistency.

3 Best Quad Rail for Ruger AR 556 (Ranked And Reviewed)

1. Pro Mag Carbine Quad Rail for Ruger AR 556

North Mountain Gear Ghillie Suit
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  • Material:
  • Style:
    Quad Rail
  • Length:
    6.25 Inches

Pro Mag’s Carbine Quad Rail Handguard is a two-piece replacement for the standard handguard on your AR 15. The quad rail design offers plenty of room to mount accessories and gives you more space for better control during firing, especially when using a magnified scope. This product can be used for many purposes, including hunting, target practice, and self-defense. The Pro Mag quad rail is a lightweight, easy to install quad rail that will give your AR 556 the versatility it needs. The Pro Mag quad rail system features four Picatinny rails, giving you plenty of attachment points for accessories such as flashlights and lasers.

This model is designed to work with any standard AR 556 upper receiver. It is made of high-impact materials and provides you with four Picatinny rails for mounting a wide variety of tactical accessories. It has four MIL-STD 1913 Picatinny rails located at the 3-, 6-, 9-, and 12 o’clock positions for mounting lights, lasers, sights, and other accessories. The top rail has a built-in heat shield to protect users from barrel heat during long shooting sessions.

North Mountain Gear Ghillie Suit


  • Weight of the front
  • Clamp-on QD base mount for sling
  • Low priced


  • Slight wobble when locked in place

2. Daniel Defense Omega Quad Rail

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  • Material:
  • Style:
  • Length:
    7 Inches

Daniel Defense Omega Quad Rail is a lightweight, free-float handguard that delivers improved ergonomics with superior heat dissipation while maintaining the strength and durability expected from Daniel Defense. The Omega rail features an uninterrupted Picatinny top rail and improved ergonomics with a comfortable slim profile. The Omega Rail also features two integrated QD sling swivel sockets at the front and rear of the rail on each side to allow push-button style QD attachments.

A continuous quad rail platform and increased gripping surface area reduce the possibility of the support hand slipping off the rail, even when wet or sweaty. The 7-inch long rail gives operators the option of a longer rail or an ultra-compact setup without additional rails. The Omega Rail is machined from 6061 T6 Aluminum and finished with Military Specification Hard Coat Anodizing for superior corrosion resistance. Daniel Defense Omega Quad Rail is a high-quality rail for your rifle. This lightweight quad rail is perfect for short rifles and carbine-length gas systems.

North Mountain Gear Ghillie Suit


  • Easy to install without messing with barrel nut
  • Tight lock-up to the mil-spec
  • Free float and requires zero modifications


  • It requires fitting
  • High priced rail system

3. Phase 5 Tactical Float Quad Rails

North Mountain Gear Ghillie Suit
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  • Material:
    Machined 6061 T6 Aluminium
  • Style:
    Free Float
  • Length:
    13 Inches

The Phase 5 Tactical Float Rail is a lightweight free float rail system that features a continuous top rail and KeyMod slots for mounting accessories. The handguard has an uninterrupted upper rail platform with M-LOK slots at 3, 6, and 9 o’clock. The continuous top rail allows you to mount your front sight or optic without removing any rail sections. This makes it easy to keep your optics mounted on your rifle when you want to quickly swap out from a long-range optic to a red dot for CQB situations. The Phase 5 Tactical Float Rail Quad Handguard is a high-quality, low-profile quad rail handguard that increases the shooter’s surface area for mounting accessories.

The slope nose design allows you to extend your top Picatinny rail well forward but slopes backward to the underside to keep the front trim and maneuverable. The quad rails allow for quick and easy accessories such as bipods, flashlights, and grips. It is compatible with AR-15s, M4s, M16s, A1/A2 rifles, or any other firearm that uses standard Picatinny rail mounts. It comes with two push-button QD sling swivel sockets that make it easier to attach your favorite sling.

North Mountain Gear Ghillie Suit


  • Versatile to chose Picatinny rails or M-LOK
  • QD sling swivel sockets
  • Type III hard coat anodized finish


  • No instructions or barrel wrench included

What To Consider While Buying The Best Quad Rail for Ruger AR 556?

When purchasing a new Quad rail for your Ruger AR 556, there are many things that you should keep in mind before you buy it from any store. The following article will give you an in-depth look at what factors need to be considered before purchasing.

Less Weight

First of all, you should consider the weight of the rail. The lack of a quad rail can considerably bring down the overall weight of your Ruger AR-556, so it would be best to buy one if you plan to use it for competitive purposes. It is always better to save as much weight as possible if you participate in a shooting competition.

Quality of Material

Secondly, you should make sure that the rail is made out of high-quality material so you won’t have to worry about breaking it while you are using it. A low-quality quad rail can break down after extended use.

It can also wear off easily and leave you with no way of replacing it if anything goes wrong, which would inconvenience your shooting experience and affect your performance on the field. You should always choose only those products made from solid steel or aluminum because they have been proven to last longer than other materials for years.


The rail must be designed specifically for your Ruger AR 556 model, or it might not fit into your gun. Many shops don’t state which models they have parts for, so you should always ensure by measuring them with those from the manufacturer and asking them if their components will fit your Ruger AR 556 rifle before buying anything from their store.  You should also check out the product’s ergonomics because a poorly designed quad rail can be more work to use than one that has been well thought out for your specific firearm.


You should also consider the price of the quad rail before buying, which gives you a lot of options to choose from, depending on your budget. If you want only the best quality products available on the market today, then go for the pricier ones made from solid steel or aluminum. Still, if you just need something decent and simple, then cheaper models will do.

Helps with Accuracy

Lastly, you must consider the level of accuracy that each quad rail can offer because this will give you an idea of how well your Ruger AR 556 will perform without any trouble in competitions. Most drills require extreme precision when aiming, so make sure that your barrel includes a quad rail in case there are going to be many shots taken during the game.


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The Ruger AR 556 rifle is a great gun for anyone looking to take down the game or protect their home. If you want to make your AR even better, you must invest in the right quad rail system and accessories for this weapon. We’ve outlined some of our favorite models below so that if you’re ready to purchase one of these systems, we can help steer you in the right direction.