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Thread: Headspace questions

  1. #1
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    Headspace questions

    I'm new to AR's and am thinking of building my first one. I have read (on AR15) that you do not need to headspace if the parts are new?? Is this true?

    If I buy a new bbl and upper and bolt carrier etc... and just put them all together, there is no need to headspace? If headspacing is needed, how do you do it??

    Thanks!

    Jon

  2. #2
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    As with most military weapons... if the parts you buy are made to the correct specifications, the headspacing should be correct. The rifle is designed so that parts can be mass produced by several different companies over many years, and all parts fit and function in the field.

    That said, notice the "if" and "should" -- headspace gauges are avaialble from the usual sources (Midway, Brownells, etc) and any good dealer or plumber will have a set... It would not be a bad idea to have it checked of course; if you purchase the barrel and bolt from a dealer on here, ask them to check HS before they ship. If you pick parts up elsewhere, find a local smith or shop and ask them to check HS (and see how it is done at the same time)... it takes all of a few minutes and I would imagine that any shop would be more than happy with a box of warm donuts in return for the service

    In any case, you should examine the first few cases fired from any rifle... a fired case can tell one a great deal about what is going on with the gun.
    I put the "Amateur" in Amateur Radio...

  3. #3
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    Thanks!! It appears that putting one of these together is not all that tough!

    I hope that is true! :-)

    Seems like it could become an addicting hobby!!

    Jon

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    thats why they call it BLack Rifle Deseise or brd welcome to the club
    me mother died when i was young before i got me toung to the sweep i was aprenticed. weep weep, weep weep your chimneys now i sweep. and in soot i sleep

    Thermo Arms inc FFL 07 SOT & hydro-graphic printed camos on moly and other types of coatings hydroprintservices.com

  5. #5
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    Quote Originally Posted by Sweep
    thats why they call it BLack Rifle Deseise or brd welcome to the club

    Thanks Sweep! I can tell it's gonna be an expensive club!! :-)

  6. #6
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    Although it's not required I check the headspace when assembling an upper. I use a USGI Field gauge which just checks for excessive headspace.
    Chief Armorer for Elite Shooting Sports in Manassas VA
    Chief Armorer for Corp Arms (FFL 07-08/SOT 02)

  7. #7
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    Quote Originally Posted by K.L. Davis
    In any case, you should examine the first few cases fired from any rifle... a fired case can tell one a great deal about what is going on with the gun.
    If you know how to read them...

    I have gathered up a small collection of headspace info here

    Going through my 223/5.56 gauge collection, I found I have the following:

    1.4636
    1.4666
    1.4696
    1.4736
    1.4740
    Randall Rausch
    AR15 Barrel Guru

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