Does the Rosco Manufacturing Bloodline 5.56 work with the Cryptic Steel Bolt Carrier Nitride?

Barrel
Rosco Manufacturing Bloodline 5.56 Government Carbine
from $99.99

Bolt Carrier Group
Cryptic Steel Bolt Carrier Nitride
from $59.99
Rosco Manufacturing barrel and Cryptic Coatings bolt carrier group compatibility
Yes, they fit
The Rosco Manufacturing Bloodline 5.56 Government works with the Cryptic Steel Bolt Carrier Nitride. 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 Cryptic Coatings 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 and any bolt carrier group
- This pairCryptic Steel Bolt Carrier Nitride5%
Share of builds with the Cryptic Steel Bolt Carrier Nitride and any barrel
- This pairRosco Manufacturing Bloodline 5.56 Government25%
Rosco Manufacturing Bloodline 5.56
- Of barrel picks
- 0.5%
- Median paid
- $121
Cryptic Steel Bolt Carrier Nitride
- Of bolt carrier group picks
- 0.2%
- Median paid
- $67
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 Cryptic Coatings 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
Upper Receiver
Gas Block
Stock & Brace
Pistol Grip
Muzzle Device

Q Q Cherry Bomb 5.56 Muzzle Brake
Fits both
Rosco Manufacturing Bloodline vs Cryptic Steel Bolt Carrier: specs and prices
| Rosco Manufacturing | Cryptic Steel Bolt Carrier | |
|---|---|---|
| Best price | $122.49 at Ammunition Depot | $59.99 at Optics Planet |
| Stores | 7 of 8 in stock | 0 of 1 in stock |
| Caliber | 5.56 NATO | n/a |
| Gas System | Carbine | n/a |
| Length | Standard | n/a |
| Twist | 1:7 | n/a |
| Contour | M4 | n/a |
| Thread | Black | n/a |
| Cartridge | n/a | 5.56 NATO |
| Finish | n/a | Nitride |
| Weight | 20.82 | n/a |
Both for $182.48 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
- Rosco Manufacturing Bloodline 5.56: lowest $99.99 on Aug 29, highest $150.99 on Aug 9 over the last 90 days.
- Cryptic Steel Bolt Carrier Nitride: lowest $59.99 on Jul 21, highest $66.50 on Jul 5 over the last 90 days.
Bolt Carrier Groups frequently paired with the Rosco Manufacturing Bloodline 5.56
Most picked next to it in real builds. Only parts our rules say fit the Rosco Manufacturing Bloodline 5.56 are listed.
Barrels frequently paired with the Cryptic Steel Bolt Carrier Nitride
Most picked next to it in real builds. Only parts our rules say fit the Cryptic Steel Bolt Carrier Nitride are listed.

















