1 in 7" twist improved polygonal rifling with 556 Noveske Match Chamber
Extended feed ramps
Bead blasted finish
Pinned Switchblock with Gas Tube
Carbine Gas System
1/2x28 threads
Medium Contour
Weight: 29 oz.
The Switchblock does not fit under a rail. To allow access to the Switchblock®, it cannot be covered up by a handguard. The longest handguard that can be used with a carbine gas system is 7" and a 9" for the mid-length, intermediate, and rifle length.
The barrel ships with Switchblock installed and the dowel pin in place. This barrel is designed for our Switchblock that is 1" long (INCLUDED). A standard front sight base is 1.9" long and WILL NOT FIT. Barrel installation should be performed by a qualified gunsmith. Removal and installation of the Switchblock is required to complete the assembly process.
* All NFA Regulations apply. Please check your local and state laws before ordering. Contact your local ATF Field Office with any NFA questions you may have.