Bloodline 10.5" M4 5.56 NATO: This Rosco 10.5" M4 5.56 NATO Bloodline Barrel is designed to be the perfect addition to any SBR or Pistol build. ALL NFA RULES APPLY! Rosco 5.56 (NATO) barrels are designed to meet the modern day carbine shooters requirements. Rosco is a long way from our daddy's "Sporter" AR, and those specs just won't cut it anymore. From properly managed dwell times for SBR's, to running Suppressed, or setting up a balanced patrol carbine Rosco has incorporated your needs into Rosco engineering. Rosco has successfully accomplished this by picking the right twist rates, gas port diameters, and barrel materials according to the barrel being made.

Rosco Manufacturing, Bloodline Barrel, 556NATO, 10.5", Black Nitride Finish, 1:7 Twist, 1/2x28, 4150 CMV
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: 1/2 x 28
Gas Block Size: .750
Gas System Length: Carbine
Barrel Crown: 11 Degree
Barrel Finish: Nitride
Barrel Extension Finish: Nitride