11-23-2022, 12:22 AM
montana Wrote:Be sure to check your head space with any new barrel before assembling it. I have sent back two new Faxon (one 5.56 and one 6.5 Grendel barrel),and many other 5.56 barrels for short chambers..Many reliability and pressure problems can be caused by short chambers. Different bolts will effect head space too, so try any bolts you plan on using with any individual barrels..If you can find a function gauge to test your barrels, it is well worth the effort. Function gauges will find any tight chambers or improper throats..
A real good idea. I bought go and no-go gauges when I built my upper. Lots of people don't do this, but I thought it was worth the effort.