Foxtrot Mike Products 5" Complete 9mm Upper Glock - Blast Diffuser

Manufactured by Foxtrot Mike Products
5 Reviews


In Stock

We are fully staffed and processing orders. Standard orders are taking approximately 2 business days to ship out. FFL orders take approximately 5 business days if you can provide us an actively receiving FFL location.


In Stock


Note: This complete upper receiver assembly has a barrel length under 16” and is therefore subject to all NFA rules and regulations. Know your local laws before purchasing.

The Foxtrot Mike Products Complete 9mm AR upper is the package you have been waiting for to finish your Glock mag AR-9 build. This 9mm upper receiver comes with all the features you want in a pistol caliber carbine. It has a 5” barrel with a linear blast diffuser attached that extends past the 5.5” M-LOK handguard. Utilizing a monolithic design that indexes with the flat top upper receiver, this handguard is securely attached and won’t rotate loose until you purposefully take it off. Included is a heavy 9mm bolt designed to reliably cycle when used with carbine recoil springs. Keep your lower receiver from getting lonely with this FM Products 9mm upper.

  • Designed for use with Glock Magazines
  • 5” barrel with blast diffuser attached
  • 5.5” 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

Whether you plan on building an SBR for home defense or a pistol for the range, this complete 9mm upper receiver group from Foxtrot Mike Products is the way to go. Feature rich, high-quality, and affordable, Foxtrot Mike Products offer cutting edge solutions utilizing the highest quality materials and manufacturing processes available.

Manufacturers Note: For optimal reliability, FM Products does not recommend using aluminum case ammo in their uppers or complete firearms.


Barrel Length5.0
BrandFoxtrot Mike Products
Caliber Gauge9mm Luger
Gas System LengthBlowback
Gas System TypeBlowback
Handguard5.5 in M-LOK Rail
Muzzle DeviceFM Blast Diffuser

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

5 reviews

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FOXTROT MIKE, Best 9mm AR in the market.

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I received today my FOXTROT MIKE 5" upper and FM9 Premium 9mm Lower Receiver along with a few Magpul GL9 PMAG 15 Glock 19. After clear up the background check and completed the transfer, I when ahead and test the product. I shot out of the box (I just lubricate the 9mm bolt and trigger) 400 rounds without any malfunction. Very happy with my FM 9mm AR. Extraordinary quality and well machinery lower. The 9mm Ar Bolt Carrier Group is one of the best that I tested. Overall, I'm happy with FOXTROT MIKE performance. Shout out to the Primary Arms team to bringing these products to the market and for the alliance with FM.

Its de best

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Mounted on a spikes lower with the stern defense Magwell adapter and fostech echo trigger. Functions flawlessly, bought a 7 in barrel to better fit my suppressor. Shot suppressed tonight for the first time and did great. Would buy again and recomend to my friends often

Damn this is a hoot! Ran like a sewing machine!


We just spent the weekend running the new upper, ran like a dream. 0 issues, ate hollow points and steel cased ammo perfectly. Fit and finish is amazing, nice tight fit to my FM Lower. Highly recommend this, great price, killer customer service.

Just disappointing.

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I've got to admit I'm disappointed. Seems the inherent problem with 9mm uppers' feed ramp is prevalent on this one. Glock factory mags seem to do worse than Magpul, but there is a lot of FFTF because the lack of a feed ramp, and not enough bevel. Otherwise it's built really well, and I like the bolt. I haven't decided if I'll return it, or machine it to suit my need. If you want something to run out of the box with a Spikes GLock Lower, I wouldn't recommend this.

Dependable and accurate

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Got this to go with an FM hybrid lower. Very light weight and portable set up. Functioning has been 100%. Accuracy is excellent, easily shooting into 2" offhand at 25 yards. Been using the 21 round P mags loaded with 20 rounds and CCI Blazer brass 115 gr. ammo.