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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

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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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Best bang for your buck

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Thoroughly impressed with the quality of this upper. Had zero issues installing and runs great. Feeds everything that we threw at it. Lower host is a AAO. Highly recommend.

3” fm9

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Runs like a sports car. endomag on a 5.56 receiver or Glock mag on a pcc



Runs/eats up all and any 9mm ammo! I have on a KE arms pcc lower and I use Glock & pmags! No problems at all! I keep checking the website for them to come back in stock!

Best 9mm upper I own

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I finally got my hands on one of these after it being out of stock for several months. I have to say it was worth the wait. I paired this up with a Spike’s lower and it’s running like a champ. I have only put about 300 rounds through it, but have yet to have any kind of problems. I have only run brass so far, but I have some steel cased I will try later. Primary Arms was fast to ship once it came back in stock. All I have to say is if your thinking about it. Get on the notification list and buy it.

Love It

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The Quality , Fit and Finish are incredible!

Well done and a wonderful price


No complaints so far. Bought this with FM premium lower and wow what a pair. I little bit heavy, bit it's probably helping with recoil and muzzle flip. Definitely worth the money. Will be buy FM products from PA again. Oh also been buying from PA for about three year now and they are my good to.

Badass little 9mm

by -

10/10 would recommend. Runs flawlessly with the matching FM Lower. Tiny Pew Pew Cannon.

Primary arms upper

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Once again couldn’t be happier with my order, from pricing, ordering to delivery. Definitely recommend this company for any of your needs.

Wow, Wow, Wow


I am seldom amazed but this little 3" upper is a tack driver. Took it out for the first time today and with a Sig Romeo 5 red dot I was getting quarter size 15 round groups offhand at 25 yards. It took about 20 rounds to dial in the optics and Magpul BUIS back up sight and after that it was all play. I shot 200 rounds and did not have a single malfunction. The fit and finish quality is great and the small size is cuter than a bugs ear.

I cleaned it up when I got home and there was very little blow by residue and clean up was a snap. I was a little concerned about the usefulness of a 3" barrel but my fears were unfounded. This thing is just plain fun.

I paired this with a PSA 9mm lower and the fit is nice and tight with no slop. I have an 8.5 and a 10.5 barrel length as well for comparison.

If you are looking for a fun addition to your 9mm fun guns, you can't go wrong with this 3" upper. The price is great as well. Five thumbs up.

This product is hot!

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Great product, low price and super fast shipping!