I know this is not the proper forum, but I haven't received a good answer from the other forums and friends.
I have a brand new Colt A2 barrel with front site and extension installed by factory. I also have a brand new mil spec flat top upper and new Colt bolt/carrier. Since both are new Colt (bolt and barrel), do I need to headspace. I assume with Colt quality, they will not be out of spec. Thanks.
Technically, if you change bolts, you should check your headspace. If it is out of spec, you will need a new/different BOLT (not carrier). Colt is just as capable of having headspace issues as any other manufacturer, so be on the safe side.
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