Rosco Manufacturing Bloodline 9mm AR-15 Barrel Medium Weight - 14.5"

Manufactured by Rosco Manufacturing
SKU: BL-145-M4-9MM-10
MPN: BL-145-M4-9MM-10
Manufactured by Rosco Manufacturing
1 Review

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The National Firearms Act regulates the configurations of some firearms assembled with barrels under 16” long. Know the NFA laws in your state before purchasing this item.

Introducing the Rosco Manufacturing Bloodline 14.5" 9mm AR-15 medium-weight barrel. This barrel is perfect for shooters who are competing in the USPSA's "PCC" division or just in search of an accurate and reliable barrel. The 1:10 twist rate of this barrel is optimized to work with 9mm rounds, making it perfect for competition, duty, or general target shooting. This barrel is ideal for those looking for "cross-platform" ballistic familiarity.

The Rosco 9mm barrels are designed specifically for sub-caliber carbines and are built to support the PCC platforms effectively. The performance of these barrels, whether running defense ammo, sub-sonic ammo, or supersonic ammo, is unparalleled. The 1:10 twist rate and 14.5" barrel length is considered to ensure that users receive the best performance possible from our barrels.


  • Compatible with AR-9 9mm PCCs
  • 14.5" barrel length
  • 4150 CMV barrel construction
  • Medium profile
  • 1:10 twist rate
  • 1/2x28 thread pitch
  • 11-degree barrel crown
  • Nitride finish for barrel and extension

Measuring at a length of 14.5" and weighing 17 oz, this barrel is made from 4150 CMV barrel material. Its Medium barrel profile is perfect for those seeking accuracy and consistency. The barrel features a 1/2x28 thread pitch, making it compatible with various popular muzzle devices. The 11-degree barrel crown is nitride finished, which not only adds to the sleek look of the barrel but also provides immense protection and durability. Additionally, the barrel extension is finished in nitride. Get your hands on the Rosco Manufacturing Bloodline 9mm AR-15 Barrel Medium Weight in 14.5" today to improve your shooting experience.

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Barrel CoatingSalt Bath Nitride
Barrel ContourMedium
Barrel Length14.5
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandRosco Manufacturing
Caliber Gauge9mm Luger
Feed RampsUnramped
Gas System LengthBlowback
Thread Pattern1/2 X 28
Twist Rate1:10
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

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Is the advertised length, very accurate after a quick zero.