Newly manufactured CHROME LINED barrel with original German or Yugo barrel collar installed and properly headspaced.

Barrel Material: CrMoV - GBQ
Commonly called "CMV"

This durable material was imported from a specialty steel manufacturer in Germany and is well suited for machine guns. It is also certified to meet MIL-B-11595E specification for US military gun barrels.

Headspace is set to the 7.62 NATO spec. We can do the tighter .308 spec upon request.  We use a slightly tighter than average NOS M53 bolt head as a standard to ensure that just about any M53 or MG42 bolt will fall in the useable range.  

**Notes on MG42/59 Bolts:

-We’ve found that these are typically .005" ‘tighter’ on the headspace compared to standard Yugo M53 and MG42 bolts.  To achieve the same specifications, we typically have to add 1-2 barrel timing shims to the collar to achieve the same measurement.  
-The locking roller diameters on the MG42/59 bolt are typically .003" larger than the standard Yugo M53 and MG42.  Sometimes these rollers won't even fit into the locking surfaces of some collars.  As with any bolt/barrel setup, fit and headspace should be inspected.

BE SURE TO CHECK YOUR HEADSPACE:

It’s very important to verify headspace with the specific bolt, barrel, and type of ammo you are using (7.62 vs  .308 Win.).  Headspace that is too short can result in very dangerous out-of-battery detonations.