Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

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 FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Questions & Answers
Does the 4.5” rail have a full size M-LOK slot at the 6 o’clock(bottom) of rail? Expert Answer

The Midwest Industries Combat Rail M-Lok Handguard features a full top picatinny rail, Two Integral Anti-Rotation QD Sling Sockets, and Seven Sides of M-Lok. The bottom of the rail will have (1) full size M-LOK slot and (1) half sized M-LOK slot.

by Ethan, Gear Expert, September 28, 2022
What is the true length of the 6” hand guard? Expert Answer

The manufacturer states that the overall length of the 6" handguard is 6". They do not state any other dimensions for the Midwest Industries Combat Rail M-Lok Handguard.

by Hunter, Gear Expert, June 23, 2022
Customer Reviews
Helpful Positive Review
Same goodness in short form by Hank, January 29, 2021
I am not sure why this product has been receiving such poor reviews. If you have a Midwest Industries combat rail you know it is a great product for the money. this one is simply shorter than the standard 15 inches that is more popular. recommended!
1/1 found this helpful
Helpful Positive Review
Perfect Fit by Sully, Verified Owner, February 3, 2024
Sleek and slim. Perfect for your PCC build. Still long enough for a C-clamp style hold and room for attachments.
1/1 found this helpful
Helpful Negative Review
No quality control by Pt, Verified Owner, July 8, 2020
After months of waiting only to get one with excessive tool marks. Can’t believe I paid retail for blemish quality product and to return this back to OpticsPlanet for a refund or exchange would take another 2 months. Frustrated.
8/18 found this helpful
Most Recent Reviews
Decent product, poor packaging by sirsloth, Verified Owner, July 19, 2020
So Midwest Industries seems to be going with some sort of vacuum sealed packaging with no other protection for their handguards. That means your item is left rattling around in the factory box without any filler. My rail came scuffed up. I almost ...
Read More...
6/8 found this helpful
Most Recent Reviews
nothing against optics planet by scissoringdyke, September 23, 2020
I bought a free float handguard by midwest industries part # mi-crm6. Midwest industries is selling this handguard and it should be a "blem". it looks like it's been kicked around and dinged up, and then they put their finish on it. for the price ...
Read More...
5/9 found this helpful
Most Recent Reviews
Can't beat it by aolive, Verified Owner, May 16, 2026
This is a great deal. Came with everything its suppose to and fit my 7.5 300 blk perfect.
Read All 23 Reviews

13% OFF Firearm Parts

HOTDLClick to Copy Coupon Code
Eligible models will have a savings offer and the coupon code to use below. Add the item to your cart and enter coupon code for savings on that select model! Limited time only. Cannot be combined with other promotions or offers.
In Stock
2 Models Available
Handguard Length
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 Midwest Industries Combat Rail M-Lok Handguard

The 4.5 inch Super Slim X M-Lok forend from Midwest Industries features a 4140 heat treated barrel nut and a 4140 heat treated torque plate that ensures the handguard can be installed and removed without incident. Unlike other forends the 4.5in X is a full seven sides of M-Lok giving you the space you need to mount multiple accessories and devices. The patented anti-rotation QD swivel sockets built into the handguard prevent any movement or wobble over time. The handguard also features a continuous 1913 picatinny rail on top that allows multiple devices to be mounted without end caps and without gaps on either side of the handguard. The handguard is a mere 5.3 ounces installed. For a slim and versatile handguard that gives you all the space you need the Combat Rail X M-Lok Handguard from Midwest Industries is the choice.image

WARNING: California`s Proposition 65

Specifications for Midwest Industries Combat Rail M-Lok Handguard:

Manufacturer: Midwest Industries
Color: Black
Finish: Anodized
Fabric/Material: 6061 Aluminum
Gun Type: Rifle
Gun Rail: Picatinny
Weight: 5.3 oz
Condition: New
Included Accessories: Barrel Nut, Wrench
Country of Origin: USA
Mount Type: M-LOK
Quantity: 1

Features of Midwest Industries Combat Rail M-Lok Handguard

  • 4140 Heat Treated Barrel Nut
  • Barrel Nut and Wrench Included
  • Features Patented 4140 Heat Treated Torque Plate
  • 4.5" overall length
  • 5.3 oz Installed Weight
  • 6061 Aluminum Type 3 Hard Coat Anodized
  • Continuous MIL-STD 1913 Picatinny Top rail
  • Two Integral Anti-Rotation QD Sling Sockets
  • Super Slim 1.5 Outside and 1.3 Inside Diameter
  • Seven Sides of M-Lok
  • 5-Slot Polymer M-Lok rail included
  • Fully Dehorned and Deburred

Package Contents:

  • Midwest Industries Combat Rail M-Lok Handguard

Midwest Industries Combat Rail M-Lok Handguard Orderable Models

List of Orderable Models

  • Midwest Industries 4.5in Combat Rail M-Lok Handguard, Black, MI-CRM4.5 , MPN: MI-CRM4.5 , UPC: 812102032359 , Code: MWI-HZ-CMRH-MI-CRM4-5
  • Midwest Industries 6in Combat Rail M-Lok Handguard, Black, MI-CRM6 , MPN: MI-CRM6 , UPC: 812102032557 , Code: MWI-HZ-CMRH-MI-CRM6

Midwest Industries Combat Rail M-Lok Handguard Unavailable & Discontinued Models

List of Unorderable Models

  • USED Midwest Industries 4.5in Combat Rail M-Lok Handguard, Black, MI-CRM4.5, EDEMO8, Condition Fair, Other , MPN: MI-CRM4.5-EDEMO8 , Code: MWI-HZ-CMRH-MI-CRM4-5-EDEMO-OT-D
  • USED, Midwest Industries 4.5in Combat Rail M-Lok Handguard, Black, MI-CRM4.5 , MPN: MI-CRM4.5-EDEMO , Code: MWI-HZ-CMRH-MI-CRM4-5-EDEMO-RE-C
  • USED, Midwest Industries 6in Combat Rail M-Lok Handguard, Black, MI-CRM6 , MPN: MI-CRM6-EDEMO , Code: MWI-HZ-CMRH-MI-CRM6-EDEMO-OB-C
  • USED, Midwest Industries 6in Combat Rail M-Lok Handguard, Black, MI-CRM6 , MPN: MI-CRM6-EDEMO , Code: MWI-HZ-CMRH-MI-CRM6-EDEMO-RE-C
  • USED, Midwest Industries 4.5in Combat Rail M-Lok Handguard, Black, MI-CRM4.5 , MPN: MI-CRM4.5-EDEMO , Code: MWI-HZ-CMRH-MI-CRM4-5-EDEMO-RE-B
  • DEMO, Midwest Industries 4.5in Combat Rail M-Lok Handguard, Black, MI-CRM4.5 , MPN: MI-CRM4.5-DEMO , Code: MWI-HZ-CMRH-MI-CRM4-5-DEMO-OB-A
  • USED, Midwest Industries 6in Combat Rail M-Lok Handguard, Black, MI-CRM6 , MPN: MI-CRM6-EDEMO , Code: MWI-HZ-CMRH-MI-CRM6-EDEMO-RE-B
  • DEMO, Midwest Industries 6in Combat Rail M-Lok Handguard, Black, MI-CRM6 , MPN: MI-CRM6-DEMO , Code: MWI-HZ-CMRH-MI-CRM6-DEMO
  • USED, Midwest Industries 6in Combat Rail M-Lok Handguard, Black, MI-CRM6 , MPN: MI-CRM6-EDEMO , Code: MWI-HZ-CMRH-MI-CRM6-EDEMO-RE-A
Compare (0)
Last updated 2026-08-21 UTC.