Build A Precision AR-15 with The MK18 Rail
The Geissele MK18 16.5″ Super Modular Rail is the ultimate long-length handguard for precision shooters, hunters, and professional users who want maximum rigidity, modularity, and compatibility with both M-LOK and Arca-Swiss mounting systems. Machined from 6061-T6 aluminum and finished with a Type III hardcoat anodizing, the MK18 features a full-length Arca-Swiss rail integrated along the bottom surface for seamless attachment to bipods, tripods, and other accessories. The MK18 is secured by Geissele’s 2.25” long barrel nut, and precision-machined interface ensures maximum rigidity and zero movement under recoil or hard use.
Features
- Trusted by military professionals and elite shooters
- Industry-leading rigidity and zero flex under pressure
- Full-length integrated bottom ARCA Swiss rail for direct tripod and bipod mounting
- Ideal for PRS, long-range AR builds, and varmint or precision shooting platforms
- Modular, adaptable, and combat-tested
- Made from 6061-T6 aluminum for strength and weight savings
- Geissele’s 2.25” proprietary steel barrel nut and anti-rotation tabs for maximum lock-up and zero shift
- Full-length Picatinny top rail for optics, lasers, and other accessories
- Made in the USA and built to military-grade standards by Geissele
Specifications
- Brand: Geissele
- Model: MK18 16.5 Inch M-LOK/Arca-Swiss Super Modular Rail AR-15 Handguard
- MPN: 05-791S
- Fit: Mil-spec AR-15 Upper Receivers
- Length: 10″
- Handguard Rail: MLOK
- Material: 6061-T6 aluminum
- Finish: Type III Hardcoat Anodized
- Colors: DDC (Desert Dirt Color)
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:
- Repair the product, including replacement of defective parts with new or refurbished parts
- 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:
- The product has not been modified, is clean and any accessories have been removed (unless otherwise instructed by a Geissele Automatics technical support agent)
- There is no ammunition in any product or packaging
- The completed Return Material Authorization form has been placed inside the packaging
- 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.
