Does the ZRODelta Forged M4 5.56mm work with the FailZero Part Bolt?
ZRODelta upper and FailZero bolt carrier group compatibility
Yes, they fit
The ZRODelta Forged M4 5.56mm works with the FailZero Part Bolt. 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 ZRODelta 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 ZRODelta Forged M4 5.56mm and any bolt carrier group
- This pairFailZero Part Bolt14%
ZRODelta Forged M4 5.56mm
- Of upper picks
- 0.1%
- Median paid
- n/a
FailZero Part Bolt
- Of bolt carrier group picks
- 0%
- Median paid
- $73
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 ZRODelta 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
Fits both
Handguard
TacFire Maximize Your 's Potential
Fits both
Barrel
Gas Block
Lower Receiver
Fits both
Pistol Grip
Optic
ZRODelta Forged M4 5.56mm vs FailZero Part Bolt: specs and prices
| ZRODelta Forged M4 5.56mm | FailZero Part Bolt | |
|---|---|---|
| Best price | $69.99 at Brownells | $73.41 at BattleHawk Armory |
| Stores | 0 of 1 in stock | 5 of 5 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Receiver Type | Forged | n/a |
| Cartridge | n/a | 5.56 NATO |
| Finish | n/a | Nickel Boron |
Both for $143.40 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
- FailZero Part Bolt: lowest $73.41 on Aug 20, highest $95.99 on Jul 14 over the last 90 days.
Bolt Carrier Groups frequently paired with the ZRODelta Forged M4 5.56mm
Most picked next to it in real builds. Only parts our rules say fit the ZRODelta Forged M4 5.56mm are listed.
Upper Receivers most paired with FailZero bolt carrier groups
The FailZero Part Bolt is not in enough builds yet, so these are the most picked next to any FailZero bolt carrier group. Only parts our rules say fit the FailZero Part Bolt are listed.
