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Foxtrot Mike Products 9mm AR-15 Lower - Stripped (Non California Compliant)

Manufactured by Foxtrot Mike Products
Manufactured by Foxtrot Mike Products
8 Reviews

In Stock

Orders of non-FFL items will ship same day if ordered before 3:30pm CST (M-F). FFL orders will ship within 5 business days if transfer details are provided.

For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.



Building a reliable 9mm AR when using Foxtrot Mike Products. The FM Products FM9 9mm 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 stripped, so you can customize it to your liking. It does, however, come with the proprietary magazine release and bolt release pre-installed. Start your AR-9 build off right with the FM Products 9mm stripped lower receiver.

  • Machined from billet 7075-T6 aluminum
  • Compatible with 9mm Glock style magazines
  • Last round bolt hold open
  • Compatible with Mil-Spec parts and triggers
  • 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 www.P65Warnings.ca.gov.

Ratings & Reviews

8 reviews

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I want another. Just to have spare. Or twins lol 😂


I had that itch to build a 9mm AR9
10 1/2” barrel,, so I had an upper to build
Saw the FM lower. With Last round open
Can not be happier , wonderful product

One of the best 9mm lowers out there. For the price, can't go wrong.


Excellent lower, love it. Machined well and LRBHO is functional 100% of the time. Better than my QTRC10 lower, the LRBHO on that thing is junk. Thanks Foxtrot Mike.



The best PCC lower in the industry in my humble opinion. The LRBHO functions flawlessly, a feature that many manufacturers seem to struggle to get right. The fit and finish are great, and this lower has features like a milled magazine stop in the magwell, spring loaded tensioner screw to adjust upper/ lower fitment and I highly doubt anyone has sheared off the bolt catch in one of these lowers, (it's intentionally overbuilt). Even if it did happen FM Products come with a lifetime warranty and the best customer service of any company I've ever done business with.

About time somebody got it right.

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Finally, an AR-9 lower that holds the mags up high enough to feed properly AND locks back on every mag, every time. I’m running mine with their FM-9 upper and 6.5oz buffer & .308 buffer spring, runs flawlessly.

FM Products - Built to an Engineers spec at a modest price.

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Purchased the FM billet lower, light weight Barrel (16"), and the Glock bolt. Assembled them with a Rise Armament RA-242 trigger and the Armaspec Stealth 9 buffer assembly (must remove the weight in the bolt). This runs faster and smoother than much more expensive PCC's the other club members are using.

Great quality, LRBHO works flawlessly

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Mates this with their 9” upper. The quality of these is great and man is this thing fun! The LRBHO worked flawlessly through the 250 rounds I did for the test/break in. My older 10 round Glock mags are the only ones that won’t drop free all my others including PMAGs drop free.

Ran perfect right out of the box

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You can stop looking, this is the lower you need. Paired with a FM AR9 upper, this is a fantastic set up. Ran perfect from the very first round. I could not be happier. Great innovations as well. Everything you could want.

Some fitting required...

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Does not work with ALL uppers. Clearance at the rear of the trigger pocket for the rear takedown lug is such that you might need to relieve the lug by filing a slight chamfer on the lug. Sent back to FM and there response was it's an upper issue and I'd either need do the above or get one of their uppers.