2 options
Click to see full view
Foxtrot Mike Products
Overview
The Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver is a fully assembled lower specifically designed for the AR-9 platform, making it ideal for 9mm builds. Its hardcoat anodized finish provides enhanced durability, while the .154 trigger pin size ensures compatibility with standard AR-15 components. This lower commonly appears in mid-length gas system builds, allowing for a balanced shooting experience in a compact package.
Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver
2 options
Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver ranked #29 of the 507 lower receivers builders added on GunPartPicker in August 2026, behind the Aero Pecision AR15 Complete Lower Receiver w/ FDE MOE Grip & SL-S Carbine Stock - FDE, with about 1 in every 167 lower receivers added to builds. Down from #17 in July. Builds with this lower receiver are mostly chambered in 5.56 NATO (64%, then 9mm 26%), split between mid-length (46%) and blowback (18%) gas systems, and nearly all AR-9.
It was out of stock everywhere we track for all of August 2026, and today the one retailer we track is out of stock. Listed prices start at $275 at Primary Arms for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every lower receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Lower Receiver Trends →The part most often added in each category by the 366 builds that include this one
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Wilson Combat AR-15 Billet Upper Receiver
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
Sightmark Core Shot A-Spec FMS 1x28x18mm Red Dot Sight - SM26017
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
FAXON Chameleon 5.56 Complete Nitride Bolt Carrier Group - FF556BCGCNITRIDE-NCR
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Foxtrot Mike Products Complete Fm9 Premium 9mm Ar-15 Lower Receiver
| Build | Parts | Total |
|---|---|---|
 | 5 | $558.31 |
 | 12 | $3090.24 |
 | 12 | $1521.10 |
 | 11 | $1199.43 |
 | 8 | $1572.63 |
| 8 | $1019.92 |
 | 13 | $1216.82 |
 | 19 | $3495.05 |
 | 22 | $1362.60 |
1 global rating
Top reviews
Great starting point for a 9mm build. Went together easily with my upper. Really happy with the hardcoat anodized finish, feels very durable. The .154 trigger pin is standard which is what I needed.
