Home / Barrel Parts / Rosco Manufacturing / Rosco Manufacturing Bloodline AR-15 Barrel 5.56x45mm NATO 12.5" M4 Contour 1:7" Twist Black Nitride
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Rosco Manufacturing Bloodline 12.5" 5.56 NATO M4 Contour 1:7 Nitride Barrel
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.750 Gas Block Size
11 Degree Barrel Crown
12.5 M4 Profile Barrel"
1:7 Twist Rate
Carbine-Length Gas System
Designed for Modern Carbine Usage
Specifications
Caliber
Brand
Model
MPN
BL-125-M4-556-7-C
UPC
181969500036
MSRP
$172
Barrel Length
12.5"
Finish
Nitride
Fits
AR-15
Color
Black
Description
The Rosco Manufacturing Bloodline M4 Contour is a 12.5-inch replacement barrel chambered in 5.56x45mm NATO for AR-15 platform rifles. It is intended for builds such as pistols and short-barreled rifles, and for running a suppressor or setting up a balanced patrol carbine.
The barrel is made from 4150 CMV steel with a nitride finish in black and features an M4 contour, a 1:7 twist rate, a 1/2-28 thread pitch for muzzle devices, and an 11-degree crown. The barrel extension is also nitride finished. The barrel is threaded and fits AR-15 receivers.
Because this barrel is classified under NFA rules, purchase and use are subject to federal requirements for the configuration built.
- Caliber: 5.56x45mm NATO
- Barrel Length: 12.5"
- Twist Rate: 1:7
- Thread Pitch: 1/2-28
- Material: 4150 CMV
- Finish: Nitride, black
- Crown: 11-degree
- Platform: AR-15