Skip to main content
HalloweenPetLawn & GardenTruck & AutomotiveSporting GoodsHorseFarm & RanchClothingLivestockPet & Animal PharmacyToolsPoultryFencing & GatesHome ImprovementOutdoor LivingHeating & CoolingHome Decor & FurnitureOutdoor Power EquipmentTrailers & TowingBoots & ShoesWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Spend $49.99 to unlock Free Delivery on most orders

|
Learn More
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​

Sign In / Enroll

Get rewarded!

​
Menu

Search

Home

Sign In

Cart
0.0
(0)
0.0 out of 5 stars.
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Sporting Goods
  4. /
  5. Shooting
  6. /
  7. Shooting Accessories & Parts
  8. /
  9. Gun Parts
  10. /

  11. Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black

  1. Home
  2. /
  4. /
  5. Gun Parts

Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black

Shop all Geissele Automatics

  • New Arrival

Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black

Item # 612348099

Geissele Automatics Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black
Geissele Automatics Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black
$300.99
or
or

Add this item to unlock free delivery!

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all Geissele Automatics

  • New Arrival

Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black

Item # 612348099

Geissele Automatics Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black
Geissele Automatics Geissele Automatics Super MK4 M-LOK Rail for AR-15, 9.5 in., Aluminum, Black

$300.99
or
or
financeCard Logo
$51/mo.†  suggested payments with 6 Months Financing or earn $15 in Rewards+ on this purchase.

Add this item to unlock free delivery!

This item is available online only

Delivery to

Free standard delivery on online footwear & Clothing purchases of $49 and over.

​
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

The Super Modular Rail (SMR) MK4 M-LOK are purpose-built and feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o'clock positions. It also features Geissele's proprietary 2" long barrel nut.

  • Super Modular Rail (SMR) MK4 M-LOK is purpose-built.
  • It includes integrated M1913 picatinny rail sections at the front of the rail.
  • The integrated picatinny rail sections are positioned at 3, 6, and 9 o'clock.
  • It features Geissele's proprietary 2-inch long barrel nut.
  • Firearm Model: AR-15
  • Firearm Type: Rifle
  • Rails: Picatinny
  • Type: Railed Forend
BrandGeissele Automatics
Country of OriginMade in USA
Ammunition CapacityN/A
CompatibilityAR-15
Gun CompatibilityRifles
CaliberN/A
Gun Part TypeRails
Primary ColorBlack
Manufacturer Part Number05283B
No questions have been asked about this product.

No questions have been asked about this product.

Q&As

No questions have been asked about this product.

No questions have been asked about this product.

Similar Items

  1. Geissele Automatics Super MK8 M-LOK Rail for AR-15/M16/M4, 15 in., Aluminum, Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super MK8 M-LOK Rail for AR-15/M16/M4, 15 in., Aluminum, Black

    $375.99
  2. Geissele Automatics Super Modular Rail for MK4, Picatinny Rail, Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK4, Picatinny Rail, Black

    $350.99
  3. Geissele Automatics Super Modular MK4 Rail for AR-15, 9.30 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK4 Rail for AR-15, 9.30 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum

    $325.99
  4. Geissele Automatics Super Modular MK14 Rail for AR-15, 9.30 in., M-LOK, Barrel Nut Included, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK14 Rail for AR-15, 9.30 in., M-LOK, Barrel Nut Included, Black, Aluminum

    $300.99
  5. Geissele Automatics Super Modular MK14 Rail for AR-15, 13.50 in., M-LOK, Barrel Nut Included, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK14 Rail for AR-15, 13.50 in., M-LOK, Barrel Nut Included, Black, Aluminum

    $350.99
  6. Geissele Automatics Super Modular Rail for MK4, 10 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK4, 10 in. Long, DDC, Aluminum
  7. Geissele Automatics Super Modular MK4 Rail, 10.50 in. Long, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK4 Rail, 10.50 in. Long, Black, Aluminum

    $325.99
  8. Geissele Automatics Super Modular MK16 Rail for AR-15, 10.50 in. M-LOK, Barrel Nut Included, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK16 Rail for AR-15, 10.50 in. M-LOK, Barrel Nut Included, Black, Aluminum

    $325.99
  9. Geissele Automatics Super Modular MK16 Rail for AR-15, 9.50 in., M-LOK, Barrel Nut Included, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK16 Rail for AR-15, 9.50 in., M-LOK, Barrel Nut Included, Black, Aluminum

    $300.99
  10. Geissele Automatics Super Modular Rail for MK4, 10.50 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK4, 10.50 in. Long, DDC, Aluminum

    $350.99
  11. Geissele Automatics Super Modular MK16 Rail for AR-15, 9.50 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK16 Rail for AR-15, 9.50 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum
  12. Geissele Automatics Super Gas Block for AR-Platform, .750 in., Black Nitride, Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Gas Block for AR-Platform, .750 in., Black Nitride, Steel

    $84.99

Items You May Like

  1. Geissele Automatics Super Modular Rail for MK14, 15 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK14, 15 in. Long, DDC, Aluminum

    $400.99
  2. Geissele Automatics Super Modular Rail for MK8, 10.50 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK8, 10.50 in. Long, DDC, Aluminum

    $350.99
  3. Geissele Automatics Super Modular Rail for MK14, 9.30 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK14, 9.30 in. Long, DDC, Aluminum

    $325.99
  4. Geissele Automatics Super 42 Buffer Spring and Buffer Combo, Black, Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super 42 Buffer Spring and Buffer Combo, Black, Steel

    $75.99
  5. Geissele Automatics Super 42 Buffer Weight for AR-Platform, Silver, Tungsten
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super 42 Buffer Weight for AR-Platform, Silver, Tungsten

    $22.99
  6. Geissele Automatics Super Modular Rail for MK8, 15 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK8, 15 in. Long, DDC, Aluminum

    $400.99
  7. Geissele Automatics Super Modular Rail for MK15, 14.50 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK15, 14.50 in. Long, DDC, Aluminum

    $550.99
  8. GrovTec M-LOK Rail, 3.8 in., Black Anodized, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    GrovTec M-LOK Rail, 3.8 in., Black Anodized, Aluminum

    $33.99
  9. Geissele Automatics Super Modular Rail for MK14, 10.50 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for MK14, 10.50 in. Long, DDC, Aluminum

    $350.99
  10. Geissele Automatics MK8 Super Modular Rail for AR-Platform, 13.50 in., M-LOK Style, 6061-T6 Aluminum, Black Anodized
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics MK8 Super Modular Rail for AR-Platform, 13.50 in., M-LOK Style, 6061-T6 Aluminum, Black Anodized
  11. Geissele Automatics Hi-Speed National Match Trigger for AR-15, Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Hi-Speed National Match Trigger for AR-15, Steel

    $289.99
  12. Magpul M-LOK Rail Covers for AR-Platforms, Type 2, Black
    4.7 out of 5 stars with 140 reviews
    4.7 (140)

    Magpul M-LOK Rail Covers for AR-Platforms, Type 2, Black

    $15.99

Customers Also Bought

  1. Geissele Automatics Super Modular MK16 Rail for AR-15, 13.50 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK16 Rail for AR-15, 13.50 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum

    $375.99
  2. Geissele Automatics Super Modular MK8 Rail for AR-Platform, 9.30 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK8 Rail for AR-Platform, 9.30 in., M-LOK, Barrel Nut Included, Desert Dirt, Aluminum

    $325.99
  3. Geissele Automatics MK8 Super Modular Rail for AR-Platform, 9.50 in., M-LOK Style, 6061-T6 Aluminum, Black Anodized
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics MK8 Super Modular Rail for AR-Platform, 9.50 in., M-LOK Style, 6061-T6 Aluminum, Black Anodized
  4. Geissele Automatics Super Modular MK15 Rail for HK 416/MR 556, 10.50 in. Long, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK15 Rail for HK 416/MR 556, 10.50 in. Long, Black, Aluminum

    $472.99
  5. Geissele Automatics Super Modular MK15 Rail for HK 416/MR 556, 10.50 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK15 Rail for HK 416/MR 556, 10.50 in. Long, DDC, Aluminum

    $525.99
  6. Geissele Automatics Super Modular Rail for HK 416, 10.50 in. Long, DDC, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail for HK 416, 10.50 in. Long, DDC, Aluminum

    $525.99
  7. Geissele Automatics Super Modular MK15 Rail for HK 416/MR 556, 14.50 in. Long, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular MK15 Rail for HK 416/MR 556, 14.50 in. Long, Black, Aluminum

    $525.99
  8. Geissele Automatics Super 42 Braided Wire Spring and H2 Buffer for AR-15, Carbine Length, Braided Wire
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super 42 Braided Wire Spring and H2 Buffer for AR-15, Carbine Length, Braided Wire

    $94.99
  9. Geissele Automatics Super 42 Braided Wire Spring and H3 Buffer for AR-15, Carbine Length, Braided Wire
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super 42 Braided Wire Spring and H3 Buffer for AR-15, Carbine Length, Braided Wire
  10. Geissele Automatics Super Precision Scope Mount/Ring Combo (Vortex 1-6) for AR-15/M4, 30mm Tube, Black Anodized, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Precision Scope Mount/Ring Combo (Vortex 1-6) for AR-15/M4, 30mm Tube, Black Anodized, Aluminum
  11. Geissele Automatics Super Modular Rail HK416 14.50 in. Long for HK 416, Black, Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Modular Rail HK416 14.50 in. Long for HK 416, Black, Aluminum

    $525.99
  12. Geissele Automatics Super Charging Handle for AR-10, Ambidextrous, Black Hardcoat Anodized, 7075-T6 Aluminum
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Geissele Automatics Super Charging Handle for AR-10, Ambidextrous, Black Hardcoat Anodized, 7075-T6 Aluminum

    $150.99

Reviews

Review this Product

Select to rate the item with 1 star. This action will open submission form.
Select to rate the item with 2 stars. This action will open submission form.
Select to rate the item with 3 stars. This action will open submission form.
Select to rate the item with 4 stars. This action will open submission form.
Select to rate the item with 5 stars. This action will open submission form.
Be the first to review this product
Get the top deals, latest trends and more
Sign up for emails from Tractor Supply today.
First Name*
Last Name*
Email*

Customer Support

  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  

    (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

About Us

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

Work With Us

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

Neighbor's Club

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

Credit Center

  • TSC Credit Card

  • Klarna

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More
  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

  • TSC Credit Card

  • Klarna

Connect & Share with the Tractor Supply Community.

Shop on the go with the Tractor Supply App

Learn More
  • Privacy policy
  • Your Privacy Choices
  • Terms and Conditions
  • California Transparency Act
  • Legal Notices
  • Accessibility
  • Responsible Disclosure Statement
  • Surprise (Balance) Medical Billing Disclosure
  • Transparency in Coverage
  • Human Rights Policy
  • Vendor Code of Conduct
  • California Notice of Collection
  • Privacy Requests

© 2026, Tractor Supply Co. All Rights Reserved.