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Questions & Answers
is there enough clearance between the handguard and the threads for a flat based silencer to be threaded onto the barrel? Expert Answer

The handguard used with the FM Products FM-9 AR 9mm Rear Charging Upper Receiver has an internal diameter of 1.3". Meaning your suppressor would have to be smaller than 1.3" in diameter to fit. You will likely need to use a different handguard or a barrel extension.

by Ethan, Gear Expert, January 9, 2024
Will this work on a christianson ar9mm Expert Answer

Yes, the FM Products FM-9 AR 9mm Rear Charging Upper Receiver will be compatible with the Christensen Arms CA9mm lower receiver.

by Ethan, Gear Expert, May 18, 2023
Customer Reviews
Helpful Positive Review
Love this upper. Ran it on my talon arms Tac RaR9 and used the foxtrot Mike upper for about 200 rounds flawlessly. Hit steel at 100 yards every shot with my Viridian scope. Very well made and extremely light weight for the length of this upper. I am ...
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Caliber: 9mm Luger Barrel Length: 16 inThreads per Inch: 1/2x36 Muzzle Device: Blast Diffuser Color: Black Condition: New

Code: 3JR-URC-FRC9R16-FM9-RS-1615

MPN: FM9-RS-1615

List: $489.00Save $20.00
$469.00

Product Info for FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch

Upgrading your firearm with an FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch is the best way to start off a new modification and build from that point. These AR15 Upper Receivers made by FM Products are constructed from a proprietary blend of match-grade 41V50 chrome moly vanadium steel that's tough enough to last and doesn't require the same premium treatment as chrome-lining. This FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch also has an M-LOK compatible handguard for advanced accessory options. Also, the bolt carrier group and charging handle come included so that you can fully assemble the upper on your own. A full-length Picatinny top rail and M-LOK compatible handguard complete the look of this upper. Get the FM Products FM-9 Rear Charging Upper Receiver, 16 inch for your pistol build for improved shooting and performance.image

Specifications for FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch:

Manufacturer: FM Products
Caliber: 9mm Luger
Barrel Length: 16 in
Threads per Inch: 1/2x36
Muzzle Device: Blast Diffuser
Color: Black
Fabric/Material: Premium Match Grade 41V50
Gun Rail: Picatinny
Gun Make: AR Platform
Gun Model: AR-15
Condition: New
Barrel Material: 4150 Chrome Moly Vanadium
Magazine Included: No
Charging Handle Included: MIL-SPEC
Mount Type: M-LOK

Features of FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch

  • Proprietary handguard / upper interlock keeps handguard true to the upper;
  • Premium Match Grade 41V50 Barrel;
  • M-LOK compatible handguard;
  • Complete upper includes bolt carrier group and charging handle;
  • FM Products Micro Brake (1/2-36 thread);
  • Compatible with 9mm Glock magazines

Package Contents:

  • FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch

FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch Orderable Models

List of Orderable Models

  • FM Products FM-9 AR 9mm Rear Charging Upper Receiver, 16 inch, Black, FM9-RS-1615 , MPN: FM9-RS-1615 , Code: 3JR-URC-FRC9R16-FM9-RS-1615
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