Does the KE Arms Kp-15 Polymer work with the Troy Industries Billet?
KE Arms lower and Troy Industries upper compatibility
Yes, they fit
The KE Arms Kp-15 Polymer works with the Troy Industries Billet. 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 KE Arms lower and Troy Industries upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Troy Industries Billet and any lower
- This pairKE Arms Kp-15 Polymer33%
KE Arms Kp-15 Polymer
- Of lower picks
- 0%
- Median paid
- n/a
Troy Industries Billet
- Of upper picks
- 0%
- 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 KE Arms lower and Troy Industries 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 Troy Industries Billet: specs and prices
| KE Arms Kp-15 Polymer | Troy Industries Billet | |
|---|---|---|
| Best price | $224.96 at AT3 Tactical | $114.99 at Primary Arms |
| Stores | 0 of 2 in stock | 0 of 1 in stock |
| Assembly | Complete | Stripped |
| Platform | AR-15 | AR-15 |
| Caliber | Multi | n/a |
| Trigger Pin | .154 | n/a |
| Color | OD Green | n/a |
| Receiver Type | n/a | Slick Side |
Both for $339.95 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.
- Troy Industries Billet: lowest $114.99 on Jul 7, highest $114.99 on Jul 7 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 most paired with Troy Industries uppers
The Troy Industries Billet is not in enough builds yet, so these are the most picked next to any Troy Industries upper. Only parts our rules say fit the Troy Industries Billet are listed.

















