Does the Rosco Manufacturing K9 5.56 NATO Sage work with the FailZero Exo Coated /?

Barrel
Rosco Manufacturing K9 5.56 NATO Sage Dynamics Patrol Length
from $144.00

Bolt Carrier Group
FailZero Exo Coated /
from $29.99
Rosco Manufacturing barrel and FailZero bolt carrier group compatibility
Yes, they fit
The Rosco Manufacturing K9 5.56 NATO Sage Dynamics works with the FailZero Exo Coated /. 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 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 K9 5.56 NATO Sage and any bolt carrier group
- This pairFailZero Exo Coated /14%
Share of builds with the FailZero Exo Coated / and any barrel
- This pairRosco Manufacturing K9 5.56 NATO Sage Dynamics33%
Rosco Manufacturing K9 5.56 NATO Sage
- Of barrel picks
- 0.2%
- Median paid
- $152
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.
Rosco Manufacturing K9 5.56 vs FailZero Exo Coated /: specs and prices
| Rosco Manufacturing K9 5.56 | FailZero Exo Coated / | |
|---|---|---|
| Best price | $171.00 at AT3 Tactical | $141.09 at BattleHawk Armory |
| Stores | 2 of 8 in stock | 5 of 6 in stock |
| Caliber | 5.56 NATO | n/a |
| Gas System | Carbine | n/a |
| Length | 11.5 | n/a |
| Twist | 1:7 | n/a |
| Contour | Enhanced Taper | n/a |
| Thread | 1/2x28 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | M16 |
| Finish | n/a | Nickel Boron |
| Weight | 27.05 | n/a |
Both for $312.09 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 K9 5.56 NATO Sage Dynamics
Price history, last 90 days
- Rosco Manufacturing K9 5.56 NATO Sage: lowest $149.49 on Aug 31, highest $184.99 on Aug 9 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 K9 5.56 NATO Sage
Most picked next to it in real builds. Only parts our rules say fit the Rosco Manufacturing K9 5.56 NATO Sage are listed.
Barrels most paired with FailZero bolt carrier groups
The FailZero Exo Coated / 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 Exo Coated / are listed.



















