Take $15 Off Orders >$100 | Use Code: PRESDAY25 | Shop Now

Discontinued: Geissele Automatics MK13 Super Modular Rail – Slim M-LOK Free Float Rail with Quad Rail for AR 15

Out of Stock
Orders will Ship within 1 Business Day
Geissele Lifetime Warranty!
TOP ADD-ON'S
Geissele Barrel Nut Wrench

Geissele Automatics Barrel Nut Wrench

$11.00
Geissele Automatics Super Charging Handle for AR15 / 5.56 - AT3 Tactical

Geissele Automatics Super Charging Handle for AR15 / 5.56 - Black

$107.10

This item is discontinued by the manufacturer. For a secure M-LOK rail with Quad Rails at the front, try the Geissele MK4!

Lightweight, Sleek M-LOK Handguard with Ultra-Durable Picatinny Rails

Barrel Nut Wrench not included! Click here to purchase the required Geissele Barrel Nut Wrench.

The MK13 is the latest entry to the Geissele line up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package. Included with the MK13 Super Modular Rail is an updated version of the proven Geissele Barrel Nut design, not only providing ease of installation but superior rigidity. The long surface contact of the 2.25” barrel nut interfaces with the receiver creating a platform that can be trusted to be straight and true the entire length of the free float rail. The MK13 is precision machined using 6061-T6 aluminum due to its strength, rigidity and lightweight properties.

Utilizing Magpul’s M-LOK technology in the 3, 6, and 9 o’clock positions and machined-in Picatinny rails at the end allow the end user to customize their rifle and securely mount lights, bipods and other firearm accessories. The Geissele MK13 Super Modular rail is finished in a durable and long lasting Type 3 Anodized Hardcoat.

Specifications

  • Lengths Available:
    • 7″
    • 9.5″
    • 13.5″
    • 15″
  • Inside Diameter: 1.27″
  • Outside Diameter: 1.52″
  • Installed Weight:
    • 7″: 10.3 oz
    • 9.5″: 11.7 oz
    • 13.5″: 13.4 oz
    • 15″: 14.9 oz

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Geissele Limited Lifetime Warranty

  • Geissele Automatics warrants its firearms, components, and tools against defects in materials and workmanship during the lifetime of the product.
  • Geissele Automatics does not warrant against normal wear and tear, items consumed or expended by their normal use (including springs, pins, etc.), product misuse (including criminal misuse, negligence or use under the influence of drugs or alcohol), accidental damage, or damage caused by improper handling, unapproved modifications to the product, defective or improper ammunition, or corrosion.
  • Defective accessories (e.g., scopes, suppressors, flash hiders, sights, slings, parts with glass or electronic components, etc.) may be warranted by their original manufacturers but are not covered by this warranty.

If you submit a valid claim under this Limited Lifetime Warranty, Geissele Automatics will authorize your return of the product and, at its sole discretion, will:

  1. Repair the product, including replacement of defective parts with new or refurbished parts
  2. Replace the product with a product of equal or greater value.

If Geissele Automatics decides to replace a product under this warranty, Geissele will keep the product being replaced.

You must satisfy all terms and restrictions set forth in this Limited Lifetime Warranty and obtain a Return Material Authorization before shipping any product to Geissele Automatics.

Before shipping any product to Geissele Automatics, please ensure the following:

  1. The product has not been modified, is clean and any accessories have been removed (unless otherwise instructed by a Geissele Automatics technical support agent)
  2. There is no ammunition in any product or packaging
  3. The completed Return Material Authorization form has been placed inside the packaging
  4. The Return Material Authorization number has been clearly written on the outside of the packaging.

Any failure to follow these instructions could result in your package being refused and returned to you without repairs at your expense.

To obtain service, contact Geissele Automatics at sales@geissele.com or 610-272-2060.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customers who viewed this item also viewed these products

Geissele Automatics MK14 Super Modular Rail - Slim M-LOK Free Float Rail - AT3 Tactical

Geissele Automatics MK14 AR 15 Super Modular Rail - Slim...

(no reviews yet)
$280.50
Lightweight, Slim-Line, and Built Tough by the Best in the Industry Barrel Nut Wrench

Geissele MK16 Super Modular Rail MLOK AR15 Handguard

(no reviews yet)
$331.50
Geissele Super Modular MK16 AR15 Rail The Geissele Super Moduler MK16 Rail is one
Geissele Automatics MK8 Super Modular Rail - M-LOK Free Float Rail - AT3 Tactical

Geissele Automatics MK8 Super Modular Rail - M-LOK Free Float...

$280.50
Geissele’s Most Popular M-LOK Rail for the Duty-Grade AR15 Barrel Nut Wrench not included!
Geissele Automatics MK4 Super Modular Rail - M-LOK Free Float Rail with Picatinny Rails - AT3 Tactical

Geissele Automatics MK4 Super Modular Rail - M-LOK Free Float...

(no reviews yet)
$306.00
Bomb-Proof M-LOK Handguard with Picatinny Rails for Ultra-Secure Mounting Barrel Nut Wrench not included!
Cloud Defensive COR Handguard - Cloud Optimized Rail - 9.55"

Cloud Defensive COR V2 AR 15 Handguard - Cloud Optimized...

(no reviews yet)
$184.99
Upgrade Both Function & Ergonomics With COR Innovative Handguard The Cloud Defensive COR V2
Odin Works AR-15 223 Wylde Barrel ULTRAlite 10.5" Carbine

Odin Works AR-15 223 Wylde Barrel ULTRAlite 10.5" Carbine

(no reviews yet)
$242.25
Extremely Slim & Accurate 10.5″ Barrel For Your 223 Wylde Carbine The Odin Works
UTG Pro Super Slim 2 Tone Free Float M-LOK Rail - AT3 Tactical

UTG Pro Super Slim 2 Tone Free Float M-LOK Rail...

Unique 2-Tone M-LOK Handguard for a Flashy AR15 Build Features Proudly Designed and Made
Daniel Defense Omega Rail - Quad Rail Picatinny Free Float Handguard

Daniel Defense Omega Rail - Quad Rail Picatinny Free Float...

$226.00
Lightweight & Easy To Install Rock-Solid Quadrail For Carbine Length Rifles The Daniel Defense
Fortis Night Rail™ 556mm Free Float Rail System - M-LOK

Fortis Night Rail™ 556mm Free Float Rail System - M-LOK...

$215.60
Featuring a Patent Pending 2 Piece Barrel Nut that Provides 360 Degree Contact –
UTG Pro AR-15 M-LOK Free Float Handguard - Super Slim

UTG Pro AR-15 M-LOK Free Float Handguard - Super Slim

Super Lightweight Handguard with a Grooved Surface for a Solid yet Comfortable Grip for

American Defense Mfg. Delta 30mm Scope Mount - 1.70" Height

(no reviews yet)
$313.17
American Defense Mfg. Delta 30mm Scope Mount – 1.70″ Medium Cantilever Height The Delta
Geissele CHF, Chrome Lined Barrel, 5.56 - 11.5"

Geissele CHF Chrome Lined 11.5 Inch .223/5.56 AR15 Barrel

(no reviews yet)
$355.98
Geissele CHF Chrome Lined .223/5.56 11.5 Inch AR15 Barrel Manufactured with the highest quality

UTG Pro Drop-In AR 15 Quad Rail with Extended Top...

$59.97
AR-15 Drop-In Quad Rail with Continuous Top Rail This handguard provides a simple solution

BCM QRF Quad Rail Free Float AR-15 Handguard - 5...

$171.95
Superb Quality with Industry-Leading Barrel Nut & Lock-up Design The BCM QRF (Quad Rail
UTG Handguard: UTG Pro Super Slim Free Float

UTG PRO Super Slim Free Float AR-15 Handguard

Top of the Line – Super Lightweight Handguard Perfectly Designed for your AR Here

Questions & Answers

Don't see the answer
you're looking for?

Loading questions...