Does the KE Arms Kp-15 Polymer work with the Yankee Hill Machine A3?
KE Arms lower and Yankee Hill Machine upper compatibility
Yes, they fit
The KE Arms Kp-15 Polymer works with the Yankee Hill Machine A3. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but KE Arms lowers with Yankee Hill Machine uppers are a common pairing.
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 KE Arms 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 Yankee Hill Machine A3 and any lower
KE Arms Kp-15 Polymer
- Of lower picks
- 0%
- Median paid
- n/a
Yankee Hill Machine A3
- Of upper picks
- 2.1%
- Median paid
- $122
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 KE Arms 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.
KE Arms Kp-15 Polymer vs Yankee Hill Machine A3: specs and prices
| KE Arms Kp-15 Polymer | Yankee Hill Machine A3 | |
|---|---|---|
| Best price | $224.96 at AT3 Tactical | $121.75 at BattleHawk Armory |
| Stores | 0 of 2 in stock | 3 of 3 in stock |
| Assembly | Complete | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | Multi | n/a |
| Trigger Pin | .154 | n/a |
| Color | OD Green | n/a |
| Receiver Type | n/a | A3 |
Both for $346.71 at today's best prices.
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.
Price history, last 90 days
- KE Arms Kp-15 Polymer: lowest $224.96 on Jul 5, highest $224.96 on Jul 5 over the last 90 days.
- Yankee Hill Machine A3: lowest $121.75 on Jul 11, highest $148.75 on Sep 24 over the last 90 days.
Upper Receivers most paired with KE Arms lowers
The KE Arms Kp-15 Polymer is not in enough builds yet, so these are the most picked next to any KE Arms lower. Only parts our rules say fit the KE Arms Kp-15 Polymer 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.



















