This is a CMMG Barrel chambered in 350 Legend, model 35D5F0A.
Perfect for building your custom Mk4 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced. Made of 4140CM with a SBN Finish.
Features:
1:16 Twist 4140 Chrome moly
1/2X28 thread pitch
Medium taper profile
Carbine length gas port .750 gas block Journal
