Description
This 10.5” Rosco Manufacturing 300 Blackout barrel was designed for SBR and Pistol use in conjunction with suppressors. The 10.5” Rosco barrel was made to be a direct replacement for any MK 18 platforms that are currently in 5.56 NATO. The 10.5” barrel is also perfect for carbines which require a slightly longer rail in order to run PEQ-15’s, D-BAL (series), or any laser aiming devices comfortably. ALL NFA RULES APPLY!
Our Rosco .300 Black Out barrels were created by using input from SOCOM end users and some of the original creators of this caliber. Every barrel was designed to optimize the original role for the 300 Blackout; to be suppressor friendly and accurate. It is our goal to get you the performance that you seek out of these AR-15 barrels when running sub-sonic ammo or supersonic ammo (depending on barrel length). Twist rates, gas port diameters, and lengths have all been taken into account when we set out to make these. Let’s just say that we don’t like leaving things to chance.
Barrel Length
10.5″
Barrel Weight
21.4 oz
Barrel Material
4150 CMV
Barrel Caliber
300 BLK
Barrel Profile
Heavy
Twist
1/7
Barrel Thread
5/8 x 24
Gas Block Size
.750
Gas System Length
Pistol
Barrel Crown
11 Degree
Barrel Finish
Nitride
Barrel Extension Finish
Nitride
