Foxtrot Mike Products AR-15 Fm-9 Heavy Buffer
Click to see full view
Foxtrot Mike Products
Overview
The Foxtrot Mike Products AR-15 FM-9 Heavy Buffer is designed specifically for the AR-15 platform and features a heavy buffer weight classified as "H." This added weight helps to reduce felt recoil and improve cycle reliability, making it suitable for builds that require enhanced performance, particularly with mid-length gas systems. This buffer is commonly used in 5.56 NATO caliber builds, optimizing their operation for smoother shooting and better accuracy.
Specifications
Available Merchants(1)
Prices checked
Stock Alert
Build history on GunPartPicker
Builders have added the Foxtrot Mike Products AR-15 Fm-9 Heavy Buffer to their builds on GunPartPicker. Since April 2026, it ranks #133 of the 210 buffers builders have added. Builds with this buffer are nearly all chambered in 5.56 NATO, split between mid-length (50%) and carbine-length (17%) gas systems, and nearly all AR-15.
It was out of stock everywhere we track every time we checked in October 2026, and today the one retailer we track is out of stock. Listed prices start at $17.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which buffer to pick?
We ranked every buffer by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Guide →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Aero Precision M4E1 Stripped AR-15 Lower Receiver - Black
Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black
Strike Industries Extended Bolt Catch
Geissele Automatics AR-15 Premium Buffer Tube Ddc
Noveske AR-15 Takedown & Pivot Pin Set
Rise Armament AR-15 Magazine Release Button - Rise Red
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Foxtrot Mike Products Ar-15 Fm-9 Heavy Buffer
| Build | Parts | Total |
|---|---|---|
 | 14 | $867.35 |
No reviews yet. Be the first to review this product!