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Foxtrot Mike Products 9mm AR-15 Upper Receiver Group - 3"

Manufactured by Foxtrot Mike Products
Manufactured by Foxtrot Mike Products
20 Reviews

In Stock

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The Foxtrot Mike Products 3" 9MM AR-15 Upper Receiver Group is built from the ground up to provide outstanding reliability and accuracy with a host of top tier features. The feature rich Foxtrot Mike Products FM-9 upper receiver offers a cutting edge design with a monolithic style. They achieved this  with a proprietary interlock between the upper and handguard. The FM-9 upper is a slim-line handguard that is M-LOK compatible for your favorite accessories. It is constructed from ultralight billet aluminum and measures a mere 3 inches, making it perfect for your pistol caliber carbine (PCC) pistol. The Foxtrot Mike Products FM-9 upper features a match grade barrel for optimal performance and an ultra-premium Bolt Carrier Group for reliable operation in all conditions and a Mil-Spec charging handle. The Foxtrot Mike Products 3” 9mm Upper Receiver Group is perfect for any PCC owner looking for an M-LOK handguard.
  • Full length picatinny top rail
  • Hardcoat anodized black finish
  • Includes heavy 9mm bolt
  • Includes Mil-Spec charging handle
  • Compatible with Mil-Spec lowers or dedicated 9mm lowers

Feature rich, high-quality, and affordable, Foxtrot Mike Products offer cutting edge solutions utilizing the highest quality materials and manufacturing processes available.
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Barrel ContourMedium
Barrel Length3.0
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandFoxtrot Mike Products
Caliber Gauge9mm Luger
FinishHardcoat Anodized
Gas System TypeBlowback
Muzzle DeviceBlast Diverter
Twist Rate1:10
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

20 reviews

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I have the fm9 upper receiver on Springfield Saint pistol lower running Endomag conversion kit and everything works and functions as it should.

Thumbs up

by -

Looks great and most importantly, functions perfectly!

Good deal


I was in the mood for a budget build when this upper went on sale. I had an Aero Precision M4E1 lower that I was finishing up, bought a Rave PCC trigger, put this upper on top, and grabbed a sub $100 red dot that was recommended by a YouTuber. I already had some Endomags loaded up. I hit the range, and had a good time! It’s almost too easy to shoot! I can’t say anything bad about it- money we’ll spent.



Great upper couldn't ask for more at this price point. I'm using this with a Anderson lower and endomag with Franklin binary trigger. Not a single issue as long as I don't go binary. I need to change the buffer weight for binary. In would be a second of I had the money. Well put together upper!

Incredible - My new favorite gun

by -

Love this and it is a great value. Paired this with the FTM premium lower, added a CMC AR-15 9MM PCC trigger and it is my new favorite gun. The fit and finish is really impressive. I was concerned about accuracy with a 3" barrel - no need for concern - super accurate out to about the 30 yards I tested.

Just cleaned it and the rifling and barrel is beautiful.

Just has a super-premium feel, but a budget price tag.

And so much fun to shoot. A little heaver than I expected. Did I mention fun?

Polymer lower ready


The 3 inch upper is notched for a right side/ambi bolt release. The 5 inch upper is not notched for the right side/ambi bolt release.
So, this 3 inch upper pairs well with polymer lower which included the right side/ambi bolt release.

Great for pairing with polymer lower.

by -

The 3 inch upper is notched for a right side/ambi bolt release lever. It pairs well with the polymer lower which does has a right side/ambi bolt release lever.

The 5 inch upper does not have a notch to accomodate a right side/ambi bolt release lever; although, the lever can be removed if you wish.

Good quality and solid


Was looking for a backpack PDW set up and wanted 5o give this a try on my PSA lower with a Maxim brace. After getting a correct buffer weight it shoots like a dream.



This thing is just well made and FUN! Foxtrot Mike makes great products with fantastic customer service. Price is great here at Primary just get it and go have fun

Tons of fun

by -

Paired this with their FM9 Premium lower, added a Radian Raptor Charging Handle, an SBA3 brace, Sylvan Arms folding adapter, and an Olight Baldr Pro-R laser/light combo. Works flawlessly. Funnest gun I own. Everyone who touches it wants one.

Con: high cost-of-ownership because I can't stop shooting it. I have to decide before I leave for the range how many rounds I am going to shoot and not bring any more with me.