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Rosco Manufacturing Bloodline
California Proposition 65 Warning

This product can expose you to chemicals including lead, known to cause cancer and birth defects. For more info visit P65Warnings.ca.gov.

Rosco Manufacturing

Bloodline

$147.00
$132.30
Sale Price
Available California compliant

Rosco Manufacturing Bloodline Barrel, M4 Profile, 5.56 NATO, 10.5" Threaded Barrel, 1/2X28 Thread Pitch, 1:7 Barrel Twist, Carbine-Length Gas System, 4150 CMV, Fits AR15, Nitride Finish, Black BL-105-M4-556-7-C

Key Details
Brand Rosco Manufacturing
Manufacturer Part Number BL-105-M4-556-7-C
UPC 181969500012
SKU ROSBL-105-M4-556-7-C
Current Stock 20 available
Quantity Updated Apr 30, 2026 8:20 AM
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Purchase Requirements
  • Final availability is confirmed at checkout.
In-Store Pickup Required: All firearm purchases must be picked up at our Beverly Hills location after background check completion.
Product Description

This Rosco 10.5" M4 5.56 NATO Bloodline Barrel is built to be the perfect addition to any SBR or pistol build. ALL NFA RULES APPLY! Rosco 5.56 (NATO) barrels are crafted to meet the needs of modern carbine shooters. Rosco is a lot different from your daddy's Sporter AR, and those specs just won't cut it anymore. From properly managing dwell times for SBRs, to running suppressed, or setting up a balanced patrol carbine, Rosco has included your needs in its design. Rosco has achieved this by selecting the right twist rates, gas port sizes, and barrel materials suited for each barrel.

Features
  • Barrel Length: 10.5";Barrel Weight: 19.28 Oz"
  • Barrel Material: 4150 CMV
  • Barrel Caliber: 5.56
  • Barrel Profile: M4
  • Twist: 1:7
  • Barrel Thread: 1/2X28
  • Gas Block Size: .750
  • Gas System Length: Carbine
  • Barrel Crown: 11 Degree
  • Barrel Finish: Nitride
  • Barrel Extension Finish: Nitride
Specifications
UPC: 181969500012
Manufacturer: Rosco Manufacturing
Manufacturer Part #: BL-105-M4-556-7-C
Model: Bloodline
Barrel Length: 10.5"
Finish: Nitride
Type: Barrel