Does the Foxtrot Mike Products FM9 Premium 9mm work with the PSA GEN4 9mm BCG?
Foxtrot Mike Products lower and Palmetto State Armory bolt carrier group compatibility
Yes, they fit
The Foxtrot Mike Products FM9 Premium 9mm works with the PSA GEN4 9mm BCG. Our compatibility rules found no conflict between them.
This exact setup is in a real GunPartPicker build.
Counted from real GunPartPicker builds: parts lists people put together while planning to buy.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
How often builders pair the Foxtrot Mike Products lower and Palmetto State Armory bolt carrier group
Backed by thousands of qualified builds that have both a lower and a bolt carrier group.
Share of builds with the Foxtrot Mike Products FM9 Premium 9mm and any bolt carrier group
- FAXON Chameleon 5.56 NitrideDoes not fit12%
- Aero Precision 5.56 BCG W/C158 BoltDoes not fit10%
- PSA Custom Fathers of Freedom 5.56 Full AutoDoes not fit8%
- This pairPSA GEN4 9mm BCG2%
Foxtrot Mike Products FM9 Premium 9mm
- Of lower picks
- 1.3%
- Median paid
- $275
PSA GEN4 9mm BCG
Not in enough builds yet to report.
How we count ⌄
These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.
Frequently built with the Foxtrot Mike Products lower and Palmetto State Armory bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Foxtrot Mike Products FM9 vs PSA GEN4 9mm BCG: specs and prices
| Foxtrot Mike Products FM9 | PSA GEN4 9mm BCG | |
|---|---|---|
| Best price | $275.00 at Primary Arms | n/a |
| Stores | 0 of 1 in stock | n/a |
| Assembly | Complete | n/a |
| Platform | AR-9 | n/a |
| Caliber | 9mm | n/a |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | Nitride |
| Cartridge | n/a | 9mm |
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Foxtrot Mike Products FM9 Premium 9mm
- Primary Armsout of stock$275.00
PSA GEN4 9mm BCG
No store lists it today.
Price history, last 90 days
- Foxtrot Mike Products FM9 Premium 9mm: lowest $275.00 on Jul 7, highest $275.00 on Jul 7 over the last 90 days.
Bolt Carrier Groups frequently paired with the Foxtrot Mike Products FM9 Premium 9mm
Most picked next to it in real builds. Only parts our rules say fit the Foxtrot Mike Products FM9 Premium 9mm are listed.
Lower Receivers most paired with Palmetto State Armory bolt carrier groups
The PSA GEN4 9mm BCG is not in enough builds yet, so these are the most picked next to any Palmetto State Armory bolt carrier group. Only parts our rules say fit the PSA GEN4 9mm BCG are listed.

Palmetto State Armory BLEM PSA Classic Stealth Lower
Fits, check noteCheck fit
Wilson Combat Forged
Fits, check noteCheck fit
PSA Lower Magpul MOE EPT Edition
Fits, check noteCheck fit
PSA Blem "Stealth" Stripped
Fits, check noteCheck fit
Aero Precision M4A1 Clone
Fits, check noteCheck fit
Smith & Wesson M&P15 Lower 5.56x45mm/.223 Remington
Fits, check noteCheck fit











