Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Questions & Answers
Can someone tell me the weight of the rail please? Expert Answer

The Geissele 9.3in M-LOK Super Modular Rail MK8 weighs 10.6 oz.

by Ethan, Gear Expert, October 18, 2024
Does this rail internally fit a deadair sandman k? Lookin to build a Noveske 300BlkOut with a 7.94” barrel and this handguard with my sandman K . Expert Answer

The Geissele 9.3in M-LOK Super Modular Rail MK8 has an internal diameter of 1.35". The Sandman K will not fit inside the Geissele 9.3in M-LOK Super Modular Rail MK8.

by Hunter, Gear Expert, September 18, 2023
Customer Reviews
Helpful Positive Review
MK8 with 10.3 inch barrel by Tristan, September 20, 2021
I paired this upper with a 10.3 inch barrel and love how it turned out. It has a generous amount of barrel sticking out from the upper (about 0.3 inches) if you choose to attach a suppressor. Rock solid attachment to my upper. Just make sure you have...
Read More...
3/3 found this helpful
Helpful Positive Review
Buy once Cry once by Kay460, January 18, 2019
Worth every penny. The rail has a super snug fit and is durable. Just like every other Geissele product, you can expect nothing but perfection from this rail from the fit, to the FDE coating. The rail shaved atleast 4 ounces off my AR.
2/2 found this helpful
Helpful Positive Review
Sturdy but hefty by Hrebs, Verified Owner, April 3, 2020
Great handguard. Easy mounting. It’s rock solid and has held up well after a about a year. It’s a little on the heavy side and not quite as ergonomic as something slimmer like a bcm. Highly recommended
1/1 found this helpful
Helpful Positive Review
Geissele Mk8 rail by Patrick, March 27, 2018
Fit and finish is fantastic! Not only does it look amazing but it is very functional. Pricy, but you get what you pay for. Also didn’t need to buy a gas block because it came with one, which is really nice! I’m a very pleased with my purchase. Thanks...
Read More...
1/1 found this helpful
Most Recent Reviews
Mk 8 9.3 geissele handguard by Pete, Verified Owner, June 6, 2025
Rigid design, no flex great lock up. Ounce I started using geissele handguards I don't use anything else.
Most Recent Reviews
Geissele rail by Lanny, Verified Owner, January 14, 2025
This rail is so freaking good looking I love it so much and there is no play. It is machined perfect
Read All 25 Reviews
Eligible models will have a savings offer. Apply coupon and add the item to your cart for savings on that select model! Limited time only. Cannot be combined with other promotions or offers. See promotion details.
Show In Stock Only
2 Models Available

Show with deals only:

Coupon Available
Color
All
Search

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Geissele 9.3in M-LOK Super Modular Rail MK8

The Super Modular Rail (SMR) MK8 M-LOK is Geissele ultra-modular model. The SMR MK8 is one of the first AR Handguards & Forends to utilize the Magpul M-LOK technology, designed to give the user full modularity while maintaining a strong and rigid platform. It uses Magpul's M-LOK technology at the 3, 6, and 9 o'clock positions and the upper 45-degree quadrants. Maximum venting at the lower 45-degree quadrants creates maximum heat dissipation and dramatically reduces the rail's overall weight. The SMR MK8 is versatile and modular, allowing users to tailor their platform to their unique needs. The SMR MK8 also features Geissele's proprietary 2-inch long barrel nut. This increases the surface contact where the rail interfaces with the receiver and creates a platform that can be trusted to be straight and true the entire length of the free-float rail. This increases accuracy and zero repeatability during disassembly and reassembly when performing maintenance. The Geissele Super Modular Rail is a great upgrade for your AR15.image

WARNING: California`s Proposition 65

Specifications for Geissele 9.3in M-LOK Super Modular Rail MK8:

Manufacturer: Geissele
Finish: Type III Hardcoat Anodized
Fabric/Material: 6061-T6
Gun Type: Rifle
Handguard Length: 9.3 in
Gun Rail: Picatinny
Condition: New
Included Accessories: Standard
Inner Diameter: 1.35 in
Outer Diameter: 2.11 in
Mount Type: M-LOK
Country of Origin: USA
Quantity: 1

Package Contents:

  • Geissele 9.3in M-LOK Super Modular Rail MK8

Geissele 9.3in M-LOK Super Modular Rail MK8 Orderable Models

List of Orderable Models

  • Geissele Super Modular Rail 9.3in, MK8, M-LOK, Black, 05-284B , MPN: 05-284B , UPC: 854014005779 , Code: 1TO-HZ-95MK8-05-284B
  • Geissele Super Modular Rail, 9.3in, MK8, M-LOK, DDC, 05-284S , MPN: 05-284S , UPC: 854014005786 , Code: 1TO-HZ-95MK8-05-284S

Geissele 9.3in M-LOK Super Modular Rail MK8 Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Geissele Super Modular Rail 9.3in, MK8, M-LOK, Black, 05-284B , MPN: 05-284B-DEMO , Code: 1TO-HZ-95MK8-05-284B-DEMO
  • DEMO, Geissele Super Modular Rail, 9.3in, MK8, M-LOK, DDC, 05-284S , MPN: 05-284S-DEMO , Code: 1TO-HZ-95MK8-05-284S-DEMO
Compare (0)