Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver

Manufactured by Foxtrot Mike Products
Manufactured by Foxtrot Mike Products
23 Reviews

In Stock

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Items that are regulated by the ATF have restrictions and requirements: 
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Building a reliable 9mm AR when using Foxtrot Mike Products. The FM Products FM9 9mm complete lower receiver is machined from a block of billet 7075-T6 aluminum and is compatible with Mil-Spec components. This dedicated 9mm AR lower is designed to be used with the highly popular Glock magazines and even features a last round bolt hold open which is not a common feature of other 9mm lowers. The AR 9mm lower Glock compatible receiver comes finished with trigger, safety selector, carbine buffer tube, pistol grip, bolt release, and takedown pins. Start your AR-9 build off right with the FM Products 9mm complete lower receiver.

  • Machined from billet 7075-T6 aluminum
  • Compatible with 9mm Glock style magazines
  • Last round bolt hold open
  • Comes fully assembled
  • Ambidextrous safety selector
  • MFT pistol grip
  • Standard Mil-Spec end plate
  • Lifetime warranty through FM Products
  • 100% made in America
  • Not California compliant

Because the AR9 lower is machined directly from billet, it allows FM Products to add features like an integral trigger guard and a magwell designed specifically for 9mm Glock magazines. It gives them the freedom to build a truly unique lower that functions well and looks great doing it.

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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BrandFoxtrot Mike Products
Caliber Marking9mm Luger
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154
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

Ratings & Reviews

23 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.

Great AR9 Lower

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Picked this up as a black friday deal. Great lower, they have made some great improvements over a traditional AR9. The mag release button is perfectly positioned, large, and very easy to push without disturbing your grip. LRBHO works perfectly.

My only ding is on the trigger. It was full of creep and not consistent. Dropped in a Rise Armament Super Sport ($85) and have had no problems since.

I paired this with their 7 inch upper, magpul glock mags, and a sig romeo. Greased the bolt bearing surfaces and the gun has run flawlessly for nearly a thousand rounds. Eats every type of ammo I have (fiocchi, federal black packs, speer lawman, gold dot, winchester white box, HSTs, and hydrashoks). Is one of my favorite range toys. Everyone who shoots it has a huge grin on their face. Wouldn't be surprised if a few of my buddies pick one up - they had that much fun with it.

Great lower

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Great lower, really high quality. Combined it with the 7in FM upper and an SBA3 brace. It’s a ton of fun to shoot, only had 1 malfunction after 500+ rounds. All the FM9 parts are really high quality, I love it.

My only complaint is the trigger has a bit of creep and is a bit heavy. Will likely replace the trigger at some point.

Other than that highly recommend it!

FMP Premium lower & 10.5" upper 350 round review

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Mated FMP Premium lower & FMP 10.5" upper and love the results with LRBHO. Ringing 6" steel at 75 yards easily with Mid-Ten 2 MoA red dot as a novice shooter. My home range will not allow longer shots shooting both 115 and 124 grn FMJ. I only shoot brass case FMJ, so I cannot speak for any other ammo flavor.

One forewarning, using the included charging handle (not the folding handle that is shown in many example photos) may lead to skin loss while rubbing against the side of the Pic rail if not careful.

Love the side charing and LRBHO, just wish the folding charging handle was included with upper. Cost this review one star.

Now considering a 16" FMP upper, even with 9mm and marginal/minimal ballistic gain. Love this gun for plinking and home defense!!

FMP 10.5" review - innovative, outstanding firearm

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Mated FMP 10.5” upper with a FMP premium lower. I found the side charging very efficient and effective while running drills at the range. Side charger and LRBHO offer excellent shooting experience with these features thoughtfully designed and executed in this firearm.

I do have one criticism, the charging handle is not the folding shown is many product photo examples, but rather a shorter static handle the can lead to raking your finger against the side of pic rail if not cautious. I did deduct a star this reason. I will also note, FMP recommends avoiding Korean mags, and I did experience frequent FTF while using SGM mags, but absolutely no failures using Glock or Magpul mags.
Of my AR-9mm PCC firearms, I most enjoy this pistol as it shoots extremely accurately and softly. I only shoot brass case 115 and 124 grain ammo, and experienced no failure nor issues when I adhere to FMP guidelines. Easily ring 6” steel at 75 yards using 2 MoA red dot while shouldered.

FM9 complete Lower and FM9 16" upper

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I mated the FM9 Premium 9mm Lower Receiver with a FM9 16 inch upper. Shot 600 rounds through it the first day, only malfunction was one light primer strike after about 550 rounds. I did not like the trigger, to much creep. Changed out the trigger with one from another gun, wiped off the carrier and oiled it lightly. took the gun to the range the next day and shoot another 350 rounds with no malfunctions. Love the side charging. Worked well with Glock factory and ETS mags. LRBHO worked every time. I seen some complaints because on FM9 uppers does not come with the folding charging handle, a folding charge handle kit can be ordered from FM (Foxtrot Mike) $25.00. I would highly recommend this gun to a friend.

Amazing PCC lower!


Went out looking for the best PCC lower and upper I could find for the money and I think I found it in FM products. Lower is excellent quality, love the oversized mag release, flared mag well, ambi saftey and LRBH. Getting a great product for a reasonable price, especially considering it's a PCC with a LRBH. Only drawback is the mil spec trigger, but I wasn't expecting anything premium on a complete lower. I'll probably swap it out in the future. Be sure to use quality mags or at least break in the cheap ones. Had some new KCL mags (FM doesn't advise using, but I'm cheap) that needed a few cycles to work flawlessly. Highly recommend overall

Great product and company


Great lower, paired with their 7” upper and sb tactical sbpdw brace. Runs flawless, only issue I’ve had was with last round bolt hold open. Couple emails to Foxtrot and all is well. Wesley at Foxtrot went above and beyond even emailing me on a Sunday morning. As is the norm, Primary was great to deal with and supper fast shipping.

FM 9mm lower works well even with my 40 S&W upper


I have 2 of those lowers since mid 2019. both work well with glock 9mm mags. I tried running them with a 40 S&W upper and Glock factory 40 S&W mags. The FM9 lower's magazine well was designed for Glock 9mm mags so the 40 mag is a tight fit (and does not fall free when ejected). However, the benefit is that the LRHO function always work with the tight fitting 40 S&W mags. whereas the 9mm mag doesn't lock the bolt back once a while due to the slack of the mag (not a fault of the design IMHO). I only got couple hundreds of rounds thru them but so far so good. FM also has great customer support when I was building the 40 S&W. The Korean mags wont even fit into the FM9s.

FM is the best company I have dealt with


I bought one of FM's uppers a couple years ago, and a brand
X lower. I had some problems getting the gun to run, short story is FM supplied me a new buffer and trigger to fix the problem, and it was not ever their lower! I was a loyal customer from then on. Awesome customer service!