+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
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.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Reviews & Ratings for Geissele MK4 Super M-Lok 10.5in Modular Rail — 6 reviews

(6 reviews)
Geissele MK4 Super M-Lok 10.5in Modular Rail
Geissele MK4 Super M-Lok 10.5in Modular Rail
As Low As $306.00
View Product
Write a Review
Compare (0)
1 item has been added
Add at least two items to compare
Show
Sort by
Filter by

phenomenal

by wcr347, Verified Owner from OK, United States Written on November 7, 2025
Great fitmeng and design just wish they provided the barrel nut tool.
Would recommend: Yes
Was it helpful to you? Yes | No
Share

The Good Stuff

by Hydro, Verified Owner from MO, United States Written on October 3, 2025
This is my second Geissele MK4 rail, first new one. I thought I would save the money and get a cheaper handguard. It just wasn't the same as the Geissele. The MK4 is just better in feel and fit for me. I do wish it would come in a 12 inch version, as the 13.5 was too long for the oversized gas block that came with the barrel. Thanks Geissele, and Optics Planet for the great deal.
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Geissele MK4 Super M-Lok Rail

by Mark, Verified Owner from CA, United States Written on August 1, 2025
Fit & finish are great. Paired up well with my blem upper that I got laying around.
Would recommend: Yes
Was it helpful to you? Yes | No
Share

geissele handguard

by jay, Verified Owner from PA, United States Written on December 26, 2024
This geissele product comes highly recommended. If your not familiar with geissele, their products are rock solid and this handguard is no exception. Be sure to pick up a geissele barrel nut wrench. And this handguard install is a breeze. The price is as good or better than geissele sells their blem products for , and believe me this has no blems , it is super nice!
Would recommend: Yes
Was it helpful to you? Yes | No
Share

mk4 rail is awesome!!!

by Beowulf tactical, Verified Owner from IN, United States Written on December 18, 2024
Anything Geissele is good to go the name speaks for it self Optics planet just gets it to you for an amazing price and quick shipping BUY IT !
Pros:
  • Its geissele
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Best handguard I’ve bought

by Phil, from NH, United States Written on December 31, 2023
Optics planet got it to me quick and it’s by far the best handguard I’ve bought. I’ve used dd , bcm , MI , etc this is definitely my favorite so far
Would recommend: Yes
Was it helpful to you? Yes | No
Share
There are no reviews that match your criteria. Would you like to review this product?