Does the Rosco Manufacturing Bloodline 5.56 M4 work with the FailZero Exo Coated /?
Barrel
Rosco Manufacturing Bloodline 5.56 M4 Carbine
from $131.49
Bolt Carrier Group
FailZero Exo Coated /
from $29.99
Rosco Manufacturing barrel and FailZero bolt carrier group compatibility
Yes, they fit
The Rosco Manufacturing Bloodline 5.56 M4 Carbine works with the FailZero Exo Coated /. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Rosco Manufacturing barrels 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 Rosco Manufacturing barrel and FailZero bolt carrier group
Backed by thousands of qualified builds that have both a barrel and a bolt carrier group.
Share of builds with the Rosco Manufacturing Bloodline 5.56 M4 and any bolt carrier group
Share of builds with the FailZero Exo Coated / and any barrel
Rosco Manufacturing Bloodline 5.56 M4
- Of barrel picks
- 6.6%
- Median paid
- $134
FailZero Exo Coated /
- Of bolt carrier group picks
- 0.2%
- Median paid
- $140
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 Rosco Manufacturing barrel 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.
Upper Receiver
Charging Handle
Gas Block
Lower Receiver
Unconfirmed
Stock & Brace
Pistol Grip
Muzzle Device
Fortis Control 300 Muzzle Brake 5/8x24
Fits, check note
Rosco Manufacturing Bloodline vs FailZero Exo Coated /: specs and prices
| Rosco Manufacturing | FailZero Exo Coated / | |
|---|---|---|
| Best price | $131.49 at Ammunition Depot | $141.09 at BattleHawk Armory |
| Stores | 7 of 8 in stock | 5 of 6 in stock |
| Caliber | AR-15 | n/a |
| Gas System | Carbine | n/a |
| Length | Standard | n/a |
| Twist | 1:7 | n/a |
| Contour | M4 | n/a |
| Thread | 1/2x28 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | M16 |
| Finish | n/a | Nickel Boron |
Both for $272.58 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.
Rosco Manufacturing Bloodline 5.56 M4 Carbine
Price history, last 90 days
- Rosco Manufacturing Bloodline 5.56 M4: lowest $131.49 on Jul 5, highest $162.99 on Aug 4 over the last 90 days.
- FailZero Exo Coated /: lowest $135.63 on Aug 22, highest $179.99 on Aug 28 over the last 90 days.
Bolt Carrier Groups frequently paired with the Rosco Manufacturing Bloodline 5.56 M4
Most picked next to it in real builds. Only parts our rules say fit the Rosco Manufacturing Bloodline 5.56 M4 are listed.
Barrels frequently paired with the FailZero Exo Coated /
Most picked next to it in real builds. Only parts our rules say fit the FailZero Exo Coated / are listed.
