headspace

hunter223

May 25, 2003 11:06

Please explain headspace. Safety concerns. There are so many reasonably priced 8mm Mausers on the market right now I would like to buy one or more. The problem is the one's I've looked at bolts and recievers numbers don't match. I know one should have rifle checked by a gunsmith before purchasing but this is not possible. Is this something I could check with a gauge. Also are the gauges for one caliber or adjustible for more than one caliber. Thanks in advance.

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  hunter223

  May 25, 2003 11:06

  I have an Ar-15 that i would like to switch the barrel on. When i remove the other barrel and put the other on will i have to have any headspace gauges seeing how they are the same brand barrels. Thanks

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  CountryGunsmith

  May 25, 2003 11:56

  Yes.
  
  
  
  
  
  
  Scrappy Doo sleeps with the fishes.

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  artvls

  May 25, 2003 13:42

  Generally it should be OK, but you really should check the headspace to make sure. What brand of barrel is it? Olympic barrels (not the ones installed on uppers)are not headspaced, each one is done with the bolt to be used with it. Barrels I've bought (from eagle & bushmaster)in the past are usually GI head spaced (no go gauge), a colt M4 upper I've got is headspaced for the go gauge, if a field gauge fits or the go gauge doesn't fit this is trouble waiting to happen. If you plan to be working on AR's in the future you should buy some gauges. You will need three gauges, go, no go & field. If barrel you plan to use is on another upper use the bolt that came with it and you should be fine.
  Dennis

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  hunter223

  May 25, 2003 16:27

  I have a model1sales m4 upper that i am going to replace with anothe 16" model1sales barrel.

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  artvls

  May 25, 2003 22:48

  Would be a good idea to check with model1sales to see how there barrels are sold. If you post this over at ar15.com someone there probably has used these barrels.
  Dennis

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  ohioghog

  May 26, 2003 05:29

  artvls gave u good advice. the "go-no go" guages are a cheap investment and you should have them on hand. if u are unsure of any weapon alterations, call the manufacturer(it may void your warranty), check, re-check, and make sure it is safe and within the guns workable limits.

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  hunter223

  May 26, 2003 11:19

  thank you all for your help. I will talk to model1sales and buy some gauges.[:)]

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  Sunray

  May 26, 2003 11:37

  The make of the barrel has nothing whatever to do with head space. If you change a barrel, you must do it properly and part of that is checking the head space.

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