carbine headspace question

How would I check the headspace on a BCm m4 barreled upper or dont i have to. I have a palmetto state armory auto bcg and thinking of getting the BCM m4 upper like zombierunner has. Thanks in advance i seem to ask alot of questions lately

 

I feel your pain there is so much to learn about these damm rifles.
I am an AK person so all this is a overwhelming to me.
Just picked up a BCM upper and will be adding a lower soon, most likely a Quinten Defense billet but I have had great help from Packerfan ( superbowl champs again I think? ) I was born in Appleton Wi. so my religon is Green Bay Packers from the Father Vince!!!!

 

If the BCG is from a reputable manufacturer, and going in an upper from a reputable manufacturer, you shouldn't ever have to worry about it.

 

BCM upper and bolt carrier with CMT bolt. Quentin Defence billet lower.

Think it is worth a check by some one with a set of guages?

 

If Bravo Company sells it, it's gtg. I'd throw it right in.

 

I got the CMT bolt from a fellow on AZS so That is the only part in the upper not BCM

 

Having your weapon checked by a competent armorer is always a good choice!

 

Yes! I'd also have them verify whether it is a 5.56mm chamber or a .223 chamber while your looking.

 

This is getting funny.

 

It is a 5.56

 

with a head spaceguage. try using a set of go and no go headspace guages