Does the Battle Arms Workhorse .223 Remington AR work with the Spike's Tactical Flat Top Upper w/?

Lower Receiver
Battle Arms Workhorse .223 Remington AR Lower
from $369.99

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 Workhorse .223 Remington AR Lower works with the Spike's Tactical Flat Top Upper w/ Ejection Port. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Battle Arms Development lowers with Spike's Tactical 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 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 Spike's Tactical Flat Top Upper w/ and any lower
Battle Arms Workhorse .223 Remington AR
- Of lower picks
- 0%
- Median paid
- $370
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

FAXON Firearms 8.5" 9mm Light Tapered
Fits, check note
Stock & Brace
Handguard

Midwest Industries SIG MPX M-LOK
Fits both
Pistol Grip
Gas Block
Battle Arms Workhorse .223 vs Spike's Tactical Flat Top: specs and prices
| Battle Arms Workhorse .223 | Spike's Tactical Flat Top | |
|---|---|---|
| Best price | $369.99 at BattleHawk Armory | $103.50 at BattleHawk Armory |
| Stores | 3 of 3 in stock | 3 of 4 in stock |
| Assembly | Stripped | Stripped |
| Platform | AR-15 | AR-9 |
| Caliber | .223 Wylde | 9mm |
| Color | Black | n/a |
| Receiver Type | n/a | Flat Top |
Both for $473.49 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
- Battle Arms Workhorse .223 Remington AR: lowest $369.99 on Jul 5, highest $371.69 on Jul 11 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 most paired with Battle Arms Development lowers
The Battle Arms Workhorse .223 Remington AR is not in enough builds yet, so these are the most picked next to any Battle Arms Development lower. Only parts our rules say fit the Battle Arms Workhorse .223 Remington AR are listed.





Foxtrot Mike Products FM Products MIKE-9 9mm Front
Fits, check noteCheck fit
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.











