Does the Bravo Company BCM® Standard 7" 300 work with the Rosco Manufacturing Bloodline 5.56 M4?

Upper Receiver
Bravo Company BCM® Standard 7" 300 BLACKOUT Group w/ KMR-A5
from $819.00

Barrel
Rosco Manufacturing Bloodline 5.56 M4 Carbine
from $131.49
Bravo Company upper and Rosco Manufacturing barrel compatibility
Yes, they fit
The Bravo Company BCM® Standard 7" 300 BLACKOUT works with the Rosco Manufacturing Bloodline 5.56 M4 Carbine. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Bravo Company uppers with Rosco Manufacturing barrels 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 Bravo Company upper and Rosco Manufacturing barrel
Backed by thousands of qualified builds that have both an upper and a barrel.
Share of builds with the Rosco Manufacturing Bloodline 5.56 M4 and any upper
Bravo Company BCM® Standard 7" 300
- Of upper picks
- 0%
- Median paid
- $819
Rosco Manufacturing Bloodline 5.56 M4
- Of barrel picks
- 6.6%
- Median paid
- $134
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 Bravo Company upper and Rosco Manufacturing barrel
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
Gas Block
Handguard
Stock & Brace
Pistol Grip
Muzzle Device

Fortis Control 300 Muzzle Brake 5/8x24
Fits, check note
Bravo Company BCM® Standard 7" vs Rosco Manufacturing Bloodline: specs and prices
| Bravo Company BCM® Standard | Rosco Manufacturing | |
|---|---|---|
| Best price | $819.00 at Bravo Company USA | $131.49 at Ammunition Depot |
| Stores | 1 of 1 in stock | 7 of 8 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 300 Blackout | AR-15 |
| Length | 7 | Standard |
| Gas System | n/a | Carbine |
| Twist | n/a | 1:7 |
| Contour | n/a | M4 |
| Thread | n/a | 1/2x28 |
Both for $950.49 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
- Bravo Company BCM® Standard 7" 300: lowest $819.00 on Jul 5, highest $819.00 on Jul 5 over the 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.
Barrels most paired with Bravo Company uppers
The Bravo Company BCM® Standard 7" 300 is not in enough builds yet, so these are the most picked next to any Bravo Company upper. Only parts our rules say fit the Bravo Company BCM® Standard 7" 300 are listed.
Upper Receivers 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.


















