New AR Barrel - Headspace check?

[platnumbob]

From some Google searches I feel that this might be an area of some debate. I just changed out the barrel on an existing Stag upper/ BCG to a Spikes barrel (which was used with 500 rounds through it). Is there any consensus as to if a headspace check is required prior to test firing or is the headspace already set during manufacturing of the barrel/ barrel extension?

The bolt locks up fine and there is typical/ proper function with snap caps.

If a headspace check is required, recommendations as to who can do it in Calgary would be helpful.

 

[greentips]

Theoretically, if everything is in-spec, the headspace is fixed by the barrel extension to the barrel.

However, my experience is that if the upper receiver extension is ridiculously and obviously out of spec, it will affect headspace. If you see an obvious gap between the barrel extension (feed ramp ) and the edge of the upper receiver, I will definitely check headspace

 

[platnumbob]

Greentips, do you mean I should check for a gap inside the chamber between the receiver and where the barrel/ extension comes in? I Don't have my AR in front of me so having a hard time picturing it. Certainly on the outside of the receiver, where the barrel nut was tightened down on the barrel, there was no gap (but I don't think that is what you mean).

 

[tiriaq]

With quality parts, there should be no headspace issue. There would be no harm in having the headspace checked with gauges, either.

 

[hbean]

Since both the Stag upper and Spike barrel has been shot with before, You shouldn't have any headspacing issue.

 

[Ms359]

I've put together a pile of ar's and I always use go no go gauges mostly just because I have them. Quality parts have never given me headspace issues, the only issue I've ever had was with a norinco bcg, threw it in the trash and tried three US made bcg's and no problem with head spacing.

 

[BattleRife]

No harm in checking headspace, it's not a bad idea. Just be aware there is no mechanism to adjust headspace. Thus if you find it is out of spec, your only practical option is to find the offending component and replace it.

 

[platnumbob]

Kind of what I was expecting, you can check but you really can't adjust. Quality parts and very good chance everything is OK. Thanks all.