Does the Spike's Tactical Flat Top Upper w/ work with the FailZero?
Upper Receiver
Spike's Tactical Flat Top Upper w/ Ejection Port Door
from $103.50
Bolt Carrier Group
FailZero
from $233.25
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. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Spike's Tactical uppers with FailZero bolt carrier groups 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 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
- FailZero AR913%
Share of builds with the FailZero and any upper
- Bravo Company Manufacturing 5.56 NATO EnhancedDoes not fit25%
Spike's Tactical Flat Top Upper w/
- Of upper picks
- 0.3%
- Median paid
- $104
FailZero
- Of bolt carrier group picks
- 0%
- Median paid
- $232
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.
Charging Handle
Aero Precision Breach Small Levers
Fits both
Stock & Brace
Handguard
Midwest Industries SIG MPX M-LOK
Fits both
Pistol Grip
Gas Block
Spike's Tactical Flat Top vs FailZero: specs and prices
| Spike's Tactical Flat Top | FailZero | |
|---|---|---|
| Best price | $103.50 at BattleHawk Armory | $233.25 at BattleHawk Armory |
| Stores | 3 of 4 in stock | 0 of 3 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-9 | n/a |
| Caliber | 9mm | n/a |
| Receiver Type | Flat Top | n/a |
| Cartridge | n/a | .308 Win |
| Finish | n/a | Black |
Both for $336.75 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: lowest $233.25 on Jul 5, highest $275.49 on Jul 7 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
Most picked next to it in real builds. Only parts our rules say fit the FailZero are listed.
