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6/1/2003 9:01:04 PM EDT
I just aquired a brand new Bushmaster upper less the bolt and carrier.  Can I just buy a new bolt and carrier and put in this upper and not worry about headspacing it?  

I have heard both yes you can just buy a new bolt and carrier and put them in your gun and then hit the range and also being told that you must headspace a bolt and carrier for the new upper.  

Any help would be appreciated on this one guys, I don't want to damage my new upper.
6/1/2003 9:25:14 PM EDT
[#1]
Your new Bushmaster upper had its headspacing set. Get a new, mil-spec, bolt/carrier assembly and your good to go!
6/1/2003 9:29:04 PM EDT
[#2]
check the headspacing with the bolt you intend to use with that upper!  (see your other post)
6/1/2003 10:24:38 PM EDT
[#3]
You can check the headspacing a thousand times then have your buddy and his mother each check it a thousand more times and there's still not a damn thing you can do about it.

Assembling from all new parts will be fine drop it in an go to town.
6/3/2003 8:27:59 AM EDT
[#4]
And to add to Dave's statement above (which I agree with), you may purchase your bolt carrier assembly from any of the top suppliers, DPMS, Bushmaster, Rock River, Olympic Arms, Armalite, etc, and your are OK.  Go shoot.
6/3/2003 2:36:10 PM EDT
[#5]
if it was me, I wouldn't just buy a bolt group and put it in the rifle without first checking out the head space with at least a  field gauge......it's a 99 percent chance that a new upper with a new bolt will probably be OK for head space...but when your face is only a couple inches from the receiver, are you really going to take the chance that it is really OK?

head space gauges cost a lot less then reconstructive surgery, or a funeral. it's your call.

6/3/2003 3:04:46 PM EDT
[#6]
I agree with Dave.
6/3/2003 7:18:41 PM EDT
[#7]
Personally, [b]I[/b] wouldn’t fire it before verifying that the headspace is OK (even though it almost certainly is).

If others on this board wish to do otherwise, that’s their prerogative.  [:D]
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