Does the Spike's Tactical Flat Top Upper w/ work with the FailZero AR9?
Upper Receiver
Spike's Tactical Flat Top Upper w/ Ejection Port Door
from $103.50
Bolt Carrier Group
FailZero AR9
from $132.03
Spike's Tactical upper and FailZero bolt carrier group compatibility
Yes, they fit
The Spike's Tactical Flat Top Upper w/ Ejection Port works with the FailZero AR9. 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 Spike's Tactical upper and FailZero bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the Spike's Tactical Flat Top Upper w/ and any bolt carrier group
- This pairFailZero AR913%
Share of builds with the FailZero AR9 and any upper
- This pairSpike's Tactical Flat Top Upper w/ Ejection Port15%
Spike's Tactical Flat Top Upper w/
- Of upper picks
- 0.3%
- Median paid
- $104
FailZero AR9
- Of bolt carrier group picks
- 0.3%
- Median paid
- $131
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 Spike's Tactical upper and FailZero bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Lower Receiver
Spike's Tactical Spider 9mm Lower
Fits both
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
Spike's Tactical Flat Top vs FailZero AR9: specs and prices
| Spike's Tactical Flat Top | FailZero AR9 | |
|---|---|---|
| Best price | $103.50 at BattleHawk Armory | $132.03 at BattleHawk Armory |
| Stores | 3 of 4 in stock | 4 of 4 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-9 | n/a |
| Caliber | 9mm | n/a |
| Receiver Type | Flat Top | n/a |
| Cartridge | n/a | 9mm |
| Style | n/a | Pistol Caliber Blow Back Carrier |
| Finish | n/a | Nitride |
Both for $235.53 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
- Spike's Tactical Flat Top Upper w/: lowest $103.50 on Jul 11, highest $112.99 on Jul 6 over the last 90 days.
- FailZero AR9: lowest $132.03 on Jul 5, highest $179.99 on Aug 28 over the last 90 days.
Bolt Carrier Groups 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.
Upper Receivers frequently paired with the FailZero AR9
Most picked next to it in real builds. Only parts our rules say fit the FailZero AR9 are listed.
