Rosco Manufacturing Bloodline 10.5" 5.56 NATO M4 Barrel 1/7 Twist
Rosco Manufacturing
$132.30
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Rosco Manufacturing
Rosco Manufacturing Bloodline 10.5" 5.56 NATO M4 Barrel 1/7 Twist
The Rosco Manufacturing Bloodline 10.5" 5.56 NATO M4 Barrel delivers precision-engineered performance purpose-built for SBR and AR-15 pistol configurations, combining modern carbine specs with the reliability serious shooters demand.
- 10.5" M4 profile barrel optimized for compact SBR and pistol builds
- 4150 Chrome Moly Vanadium steel construction for exceptional durability and longevity
- 1/7 twist rate stabilizes a wide range of 5.56 NATO and .223 projectiles
- Engineered gas port diameter ensures reliable cycling suppressed or unsuppressed
- Properly managed dwell time tuned specifically for short-barreled applications
- 19.28 oz. weight balances a lightweight build without sacrificing barrel integrity
Who This Is For
The Rosco Bloodline 10.5" barrel is ideal for AR-15 pistol builders, NFA-registered SBR owners, and tactical shooters who need a compact, hard-hitting setup that runs cleanly in close-quarters environments. It's equally well-suited for suppressor-ready builds, home defense configurations, and patrol carbines where maneuverability is a priority. If you're done compromising on specs and want a barrel engineered around the demands of modern carbine use, the Bloodline delivers.
Specifications
| Brand | Rosco Manufacturing |
|---|---|
| Series | Bloodline |
| Barrel Length | 10.5" |
| Caliber | 5.56 NATO / .223 Rem |
| Barrel Profile | M4 |
| Barrel Material | 4150 Chrome Moly Vanadium (CMV) |
| Twist Rate | 1:7" |
| Weight | 19.28 oz. |
| Gas System | Pistol Length |
| Platform | AR-15 |
| Intended Use | SBR / Pistol Build |
| NFA Status | All NFA Rules Apply |
Frequently Asked Questions
Is this barrel compatible with a standard AR-15 lower receiver and pistol-length gas system?
Yes. The Rosco Bloodline 10.5" barrel is designed for the AR-15 platform and uses a pistol-length gas system, which is the correct configuration for a 10.5" barrel. It will mate with any standard mil-spec AR-15 upper receiver and is compatible with pistol-length gas tubes and most standard bolt carrier groups.
Can this barrel be used on an AR-15 pistol, or does it require an NFA tax stamp?
A 10.5" barrel may be used legally on an AR-15 pistol (with a pistol brace) without an NFA tax stamp, provided the firearm is configured and registered as a pistol. However, if you intend to install this barrel on a rifle with a stock — creating a short-barreled rifle (SBR) — you must obtain the appropriate NFA tax stamp and comply with all applicable federal and state regulations. All NFA rules apply.
How does the 1/7 twist rate perform with common 5.56 NATO ammunition?
The 1:7" twist rate is the standard for modern military and law enforcement carbines and is optimized to stabilize heavier .223/5.56 NATO projectiles — typically 62 to 77 grain bullets — across a short barrel. It performs reliably with M193 (55 gr) and M855 (62 gr) ammunition and excels with heavier defensive and match loads. The 1/7 twist also pairs well with suppressor-ready setups, maintaining bullet stability even at reduced velocities.
