Does the Battle Arms Xiphos 9mm AR Lower work with the Spike's Tactical Flat Top Upper w/?

Lower Receiver
Battle Arms Xiphos 9mm AR Lower
from $221.99

Upper Receiver
Spike's Tactical Flat Top Upper w/ Ejection Port Door
from $103.50
Battle Arms Development lower and Spike's Tactical upper compatibility
Yes, they fit
The Battle Arms Xiphos 9mm AR Lower works with the Spike's Tactical Flat Top Upper w/ Ejection Port. 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 Battle Arms Development lower and Spike's Tactical upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Battle Arms Xiphos 9mm AR Lower and any upper
- This pairSpike's Tactical Flat Top Upper w/ Ejection Port17%
Share of builds with the Spike's Tactical Flat Top Upper w/ and any lower
- This pairBattle Arms Xiphos 9mm AR Lower5%
Battle Arms Xiphos 9mm AR Lower
- Of lower picks
- 0.1%
- Median paid
- $230
Spike's Tactical Flat Top Upper w/
- Of upper picks
- 0.3%
- Median paid
- $104
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 Battle Arms Development lower and Spike's Tactical upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle

Aero Precision Breach Small Levers
Fits both
Barrel
Stock & Brace
Pistol Grip
Handguard

Midwest Industries SIG MPX M-LOK
Fits both
Gas Block
Battle Arms Xiphos 9mm AR vs Spike's Tactical Flat Top: specs and prices
| Battle Arms Xiphos 9mm AR | Spike's Tactical Flat Top | |
|---|---|---|
| Best price | $269.00 at MidwayUSA | $103.50 at BattleHawk Armory |
| Stores | 1 of 5 in stock | 3 of 4 in stock |
| Assembly | Stripped | Stripped |
| Platform | AR-9 | AR-9 |
| Caliber | 9mm | 9mm |
| Color | Black | n/a |
| Receiver Type | n/a | Flat Top |
Both for $372.50 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.
Battle Arms Xiphos 9mm AR Lower
Price history, last 90 days
- Battle Arms Xiphos 9mm AR Lower: lowest $221.99 on Jul 5, highest $269.00 on Jul 10 over the last 90 days.
- Spike's Tactical Flat Top Upper w/: lowest $103.50 on Jul 11, highest $112.99 on Jul 6 over the last 90 days.
Upper Receivers frequently paired with the Battle Arms Xiphos 9mm AR Lower
Most picked next to it in real builds. Only parts our rules say fit the Battle Arms Xiphos 9mm AR Lower are listed.
Lower Receivers frequently paired with the Spike's Tactical Flat Top Upper w/
Most picked next to it in real builds. Only parts our rules say fit the Spike's Tactical Flat Top Upper w/ are listed.


















