Does the Foxtrot Mike Products FM9 Premium 9mm work with the Yankee Hill Machine A3?
Foxtrot Mike Products lower and Yankee Hill Machine upper compatibility
Yes, they fit
The Foxtrot Mike Products FM9 Premium 9mm works with the Yankee Hill Machine A3. Our compatibility rules found no conflict between them.
This exact setup has been built more than once on GunPartPicker.
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 Yankee Hill Machine upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Foxtrot Mike Products FM9 Premium 9mm and any upper
- Wilson Combat BilletDoes not fit16%
- Bravo Company Mfg w/ Laser T-MarkingsDoes not fit9%
- Bravo Company Manufacturing 5.56 NATO Mid-LengthDoes not fit9%
- Radical Firearms 5.56 Socom UpperDoes not fit4%
- This pairYankee Hill Machine A31%
Share of builds with the Yankee Hill Machine A3 and any lower
- This pairFoxtrot Mike Products FM9 Premium 9mm7%
Foxtrot Mike Products FM9 Premium 9mm
- Of lower picks
- 1.3%
- Median paid
- $275
Yankee Hill Machine A3
- Of upper picks
- 0.2%
- Median paid
- n/a
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 Yankee Hill Machine upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Stock & Brace
Charging Handle

Radian Raptor & Talon Safety Selector Combo
Unconfirmed
Handguard

TacFire Maximize Your 's Potential
Fits both
Foxtrot Mike Products FM9 vs Yankee Hill Machine A3: specs and prices
| Foxtrot Mike Products FM9 | Yankee Hill Machine A3 | |
|---|---|---|
| Best price | $275.00 at Primary Arms | n/a |
| Stores | 0 of 1 in stock | n/a |
| Assembly | Complete | Stripped |
| Platform | AR-9 | AR-15 |
| Caliber | 9mm | n/a |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | n/a |
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
Yankee Hill Machine A3
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.
Upper Receivers 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 frequently paired with the Yankee Hill Machine A3
Most picked next to it in real builds. Only parts our rules say fit the Yankee Hill Machine A3 are listed.

















