Rosco Manufacturing Bloodline 5.56 AR-15 Barrel Government Carbine 10.5"

All Rosco Manufacturing barrels
Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine 10.5" - Barrel for AR-15 - view 1
Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine 10.5" - Barrel for AR-15 - view 2
Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine 10.5" - Barrel for AR-15 - view 3
Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine 10.5" - Barrel for AR-15 - view 4
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Rosco Manufacturing

Overview

The Rosco Manufacturing Bloodline 5.56 AR-15 Barrel features a compact 10.5-inch length with an M4 profile, optimized for maneuverability while maintaining accuracy. Designed for use with a carbine-length gas system, this barrel has a .750 gas block diameter and a 1:7 twist rate, allowing it to stabilize a variety of projectile weights effectively. This barrel is commonly found in builds that prioritize a compact form factor and 5.56 NATO caliber performance.

Specifications

MPNBL-105-M4-556-7-C
Twist Rate1:7
Barrel Length10.5
Gas System LengthCarbine
Caliber5.56 NATO
CoatingQPQ/Nitride
Thread Pitch1/2x28
Barrel ProfileM4
Gas Block Diameter.750

Available Merchants(9)

Prices checked

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Primary Arms logo
Primary Arms
Free shipping
Shipping Speed
In Stock
$144.90
Ammunition Depot logo
Ammunition Depot
~$28.90 est. shipping
Shipping Speed
Out of Stock
$117.99
Brownells logo
Brownells
Free shipping
Shipping Speed
Out of Stock
$122.50
GritR Sports logo
GritR Sports
Shipping varies
Shipping Speed
Out of Stock
$127.17
Optics Planet logo
Optics Planet
Free shipping
Shipping Speed
Out of Stock
$132.30
AT3 Tactical logo
AT3 Tactical
Shipping TBD
Shipping Speed
Out of Stock
$132.30
KY Gun Company logo
KY Gun Company
Flat rate shipping
Shipping Speed
Out of Stock
$132.30
BattleHawk Armory logo
BattleHawk Armory
Shipping varies
Shipping Speed
Out of Stock
$137.70
Palmetto State Armory logo
Palmetto State Armory
Free shipping
Shipping Speed
Out of Stock
$152.99

Build history on GunPartPicker

Builders have added the Rosco Manufacturing Bloodline 5.56 AR-15 Barrel Government Carbine 10.5" to their builds on GunPartPicker. Since April 2026, it ranks #108 of the 1,047 barrels builders have added. Builds with this barrel are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and nearly all AR-15.

It was in stock most times we checked in October 2026, but today only Primary Arms has it in stock. Buying today, the lowest price is $144.90 at Primary Arms, above October's low of $117.99, so a better deal may come back.

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Builds Featuring This Part

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Builds in the community that include the Rosco Manufacturing Bloodline 5.56 Ar-15 Barrel Government Carbine 10.5"

BuildPartsTotal
Hog hunter 10.5" 5.56 build
Hog hunter 10.5" 5.56
21$2085.16
brownells 10.5" 5.56 build
brownells 10.5" 5.56
24$737.26
10.5" 5.56 build
10.5" 5.56
13$1075.40

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