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Questions & Answers
Has anyone used one of these on a rifle length gas system rifle with traditional A2 front sight block? 12.625 or 13.375" work on this build? Expert Answer

You would need a low profile gas block for any free float handgaurd to work.

by Patrick, Gear Expert, September 29, 2021
I have a M&P 15 sport II . It says I have a 16 inch Barrell . So would I get a 15” handgaurd ? Expert Answer

No, you will need a low profile gas block for this to work.

by Patrick, Gear Expert, September 13, 2021
Customer Reviews
Helpful Positive Review
great handguard by E, Verified Owner, January 14, 2026
These are my go to handguards if I’m looking for something slightly nicer but still at a realistic cost. Fits super well with m4e1 uppers. I like them better than the aero options to be honest.
1/1 found this helpful
Helpful Positive Review
Midwest makes a great handguard for the price. Out of all the handguards I’ve used, (Noveske,Troy,Diamond Head, Aero, RRA, LWRC) these are hard to beat for the price.
2/2 found this helpful
Helpful Positive Review
love it, will buy it again. by Bruce C, Verified Owner, August 26, 2024
Very well made great quality. Easy to install. Works great with my rilfespeed adjustable gas block. I like it so much bought another one for my son's rifle.
1/1 found this helpful
Helpful Positive Review
Best feeling handguard out there by Jeff B, Verified Owner, December 21, 2020
Very well made, no sharp points and sturdy. Easy install, just make sure you read the directions. My handguards QD sockets do not fit any QD slings I own (magpul and blue force gear) so I ordered a few midwest industries swivels and they don't fit ei...
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2/2 found this helpful
Helpful Positive Review
Well Made Very Happy by John, July 13, 2021
Well made, I own several MI rails and each has been excellent. Fit and finish is good, and I have never had any issues holding zero. I also appreciate how light weight it is but still rigid. Would recommend to others.
2/2 found this helpful
Helpful Positive Review
Best Midwest Industries Handguard Yet by Chase, Verified Owner, November 29, 2020
Ordered both a 10.5" and 15" G4M rail. This is their best rail to date. Very slim, lightweight, seven sides of MLOK making it very modular, integrated QD sockets, barrel nut doesn't need to be timed, integrated anti-rotation tabs. The integrated ant...
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5/6 found this helpful
Read All 42 Reviews
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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 MI-G4M One Piece Free-Float AR Handguard

Install this Midwest Industries MI-G4M One Piece Free-Float AR Handguard to make your rifle easier to shoot while expanding your customization options. Midwest Industries machined these AR Handguards & Forends from 6061 aluminum and Type III hard coat anodized it to create a rugged and lightweight platform. For even greater mounting options, the Midwest Industries MI-G4M One Piece Free-Float AR Handguard has seven sides of M-LOK to host your scope, weapon lights and other necessary accessories. The continuous Picatinny rail is the perfect platform to host your weapon sights, optics and other weapon accessories. Five integral anti-rotation QD sling sockets help you attach slings and other attachments so that they stay put and secure throughout the shot process. One of the most compact free-floating AR Handguards on the market, the Midwest Industries MI-G4M One Piece Free-Float 6061 Aluminum Handguard is built for your weapon and is a great option to increase your overall shooting experience.image

Specifications for Midwest Industries MI-G4M One Piece Free-Float AR Handguard:

Manufacturer: Midwest Industries
Color: Black
Finish: Type III Hard Coat Anodized
Fabric/Material: 6061 Aluminum
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Handguard Type: Free-Float
Gun Rail: M-LOK
Included Accessories: Standard
Inner Diameter: 1.3 in
Outer Diameter: 1.5 in
Country of Origin: USA
Mount Type: Picatinny
Quantity: 1

Features of Midwest Industries MI-G4M One Piece Free-Float AR Handguard

  • 4140 Heat Treated Barrel Nut
  • Barrel Nut and Wrench Included
  • Features Patented 4140 Heat Treated Torque Plate
  • Continuous MIL-STD 1913 Picatinny Top rail
  • Five 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
  • MI Lifetime Warranty

Package Contents:

  • Midwest Industries MI-G4M One Piece Free-Float AR Handguard

Midwest Industries MI-G4M One Piece Free-Float AR Handguard Orderable Models

List of Orderable Models

  • Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 12.625in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M12.625 , MPN: MI-G4M12.625 , UPC: 812102032991 , Code: MWI-HZ-MIH1-MI-G4M12-625
  • Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 10.5in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M10.5 , MPN: MI-G4M10.5 , UPC: 812102033035 , Code: MWI-HZ-MIH1-MI-G4M10-5
  • Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 13.375in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M13.375 , MPN: MI-G4M13.375 , UPC: 812102033004 , Code: MWI-HZ-MIH1-MI-G4M13-375
  • Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 14in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M14 , MPN: MI-G4M14 , UPC: 812102033011 , Code: MWI-HZ-MIH1-MI-G4M14
  • Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 15in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M15 , MPN: MI-G4M15 , UPC: 812102033028 , Code: MWI-HZ-MIH1-MI-G4M15
  • DEMO, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 12.625in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M12.625 , MPN: MI-G4M12.625-DEMO , Code: MWI-HZ-MIH1-MI-G4M12-625-DEMO-OB-A

Midwest Industries MI-G4M One Piece Free-Float AR Handguard Unavailable & Discontinued Models

List of Unorderable Models

  • USED Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 10.5in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M10.5, EDEMO3, Used, Condition Fair , MPN: MI-G4M10.5-EDEMO3 , Code: MWI-HZ-MIH1-MI-G4M10-5-EDEMO3
  • DEMO, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 10.5in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M10.5 , MPN: MI-G4M10.5-DEMO , Code: MWI-HZ-MIH1-MI-G4M10-5-DEMO-OB-A
  • USED, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 10.5in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M10.5 , MPN: MI-G4M10.5-EDEMO , Code: MWI-HZ-MIH1-MI-G4M10-5-EDEMO-RE-C
  • DEMO, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 12.625in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M12.625 , MPN: MI-G4M12.625-DEMO , Code: MWI-HZ-MIH1-MI-G4M12-625-DEMO
  • DEMO, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 10.5in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M10.5 , MPN: MI-G4M10.5-DEMO , Code: MWI-HZ-MIH1-MI-G4M10-5-DEMO
  • USED, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 13.375in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M13.375 , MPN: MI-G4M13.375-EDEMO , Code: MWI-HZ-MIH1-MI-G4M13-375-EDEMO-RE-B
  • USED, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 12.625in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M12.625 , MPN: MI-G4M12.625-EDEMO , Code: MWI-HZ-MIH1-MI-G4M12-625-EDEMO-RE-A
  • DEMO, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 15in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M15 , MPN: MI-G4M15-DEMO , Code: MWI-HZ-MIH1-MI-G4M15-DEMO
  • USED, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 15in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M15 , MPN: MI-G4M15-EDEMO , Code: MWI-HZ-MIH1-MI-G4M15-EDEMO-RE-B
  • DEMO, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 14in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M14 , MPN: MI-G4M14-DEMO , Code: MWI-HZ-MIH1-MI-G4M14-DEMO
  • USED, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 15in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M15 , MPN: MI-G4M15-EDEMO , Code: MWI-HZ-MIH1-MI-G4M15-EDEMO-RE-A
  • DEMO, Midwest Industries MI-G4M One Piece Free-Float AR Handguard, 15in Length, M-LOK, 6061 Aluminum, Anodized, Black, MI-G4M15 , MPN: MI-G4M15-DEMO , Code: MWI-HZ-MIH1-MI-G4M15-DEMO-OB-A
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Last updated 2026-09-15 UTC.