Does the Yankee Hill Machine work with the Radical Firearms 5.56 Barreled Upper?
Yankee Hill Machine lower and Radical Firearms upper compatibility
Yes, they fit
The Yankee Hill Machine works with the Radical Firearms 5.56 Barreled Upper. 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 Yankee Hill Machine lower and Radical Firearms upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Yankee Hill Machine and any upper
- This pairRadical Firearms 5.56 Barreled Upper8%
Share of builds with the Radical Firearms 5.56 Barreled Upper and any lower
- This pairYankee Hill Machine8%
Yankee Hill Machine
- Of lower picks
- 1.3%
- Median paid
- n/a
Radical Firearms 5.56 Barreled Upper
- Of upper picks
- 1.2%
- 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 Yankee Hill Machine lower and Radical Firearms upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Handguard

TacFire Maximize Your 's Potential
Fits both
Barrel
Gas Block
Trigger
Pistol Grip
Yankee Hill Machine vs Radical Firearms 5.56 Barreled: specs and prices
| Yankee Hill Machine | Radical Firearms 5.56 | |
|---|---|---|
| Best price | n/a | n/a |
| Stores | n/a | n/a |
| Assembly | Parts Kit | Complete |
| Platform | AR-15 | AR-15 |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | n/a |
| Gas System Length | n/a | Mid-Length |
| Caliber | n/a | 5.56 NATO |
| Length | n/a | 16 |
| Weight | 2.2 | n/a |
Upper Receivers frequently paired with the Yankee Hill Machine
Most picked next to it in real builds. Only parts our rules say fit the Yankee Hill Machine are listed.
Lower Receivers frequently paired with the Radical Firearms 5.56 Barreled Upper
Most picked next to it in real builds. Only parts our rules say fit the Radical Firearms 5.56 Barreled Upper are listed.



















