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Posted: 12/14/2011 5:37:49 PM EDT
| How do you "fit" a bolt to the barrel? Won't they "fit" themselves when you shoot the gun? Sorry if this is a dumb question. |
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Are you talking about head spacing, sometimes its not a good idea just to throw a barrel and bolt in an upper and add live ammo with out checking the HS.. Could be deadly.. I don't think they are referring to head spacing. The barrel needs to be mated to the intended receiver to measure that. |
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Who told you to "fit" the bolt? Some Brl makers and parts usppliers claim to include a "fitted" bolt with certain Brls. Its marketing BS. Either it headspaces correctly or it does not. Nobody is lapping the lugs like on a bolt action rifle. I would avoid any vendor that even suggest the concept of "fitted" bolts in the AR15 platform. |
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Who told you to "fit" the bolt? Some Brl makers and parts usppliers claim to include a "fitted" bolt with certain Brls. Its marketing BS. Either it headspaces correctly or it does not. Nobody is lapping the lugs like on a bolt action rifle. I would avoid any vendor that even suggest the concept of "fitted" bolts in the AR15 platform. Actually, certain vendors have somebody sit there with headspace gauges and find a bolt that fits the minimum headspace spec for a given barrel. I'm not convinced it does anything but some people are. |
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Who told you to "fit" the bolt? Some Brl makers and parts usppliers claim to include a "fitted" bolt with certain Brls. Its marketing BS. Either it headspaces correctly or it does not. Nobody is lapping the lugs like on a bolt action rifle. I would avoid any vendor that even suggest the concept of "fitted" bolts in the AR15 platform. Actually, certain vendors have somebody sit there with headspace gauges and find a bolt that fits the minimum headspace spec for a given barrel. I'm not convinced it does anything but some people are. Thats a headspaced to minimum bolt, not a "fitted" bolt. |
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Who told you to "fit" the bolt? Some Brl makers and parts usppliers claim to include a "fitted" bolt with certain Brls. Its marketing BS. Either it headspaces correctly or it does not. Nobody is lapping the lugs like on a bolt action rifle. I would avoid any vendor that even suggest the concept of "fitted" bolts in the AR15 platform. Actually, certain vendors have somebody sit there with headspace gauges and find a bolt that fits the minimum headspace spec for a given barrel. I'm not convinced it does anything but some people are. Thats a headspaced to minimum bolt, not a "fitted" bolt. So what is the difference? I never checked head space on an upper Iv'e assembled. I put together quite a few using Noveske barrels and bolt carrier groups from them. They told me head spacing would not be necessary and that it was GTG. |
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Who told you to "fit" the bolt? Some Brl makers and parts usppliers claim to include a "fitted" bolt with certain Brls. Its marketing BS. Either it headspaces correctly or it does not. Nobody is lapping the lugs like on a bolt action rifle. I would avoid any vendor that even suggest the concept of "fitted" bolts in the AR15 platform. Actually, certain vendors have somebody sit there with headspace gauges and find a bolt that fits the minimum headspace spec for a given barrel. I'm not convinced it does anything but some people are. Thats a headspaced to minimum bolt, not a "fitted" bolt. Just repeating the word of a vendor who divulged his secret. |
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Barrels sold with matched bolts are not done so with standard go/no-go gages.
http://www.midwayusa.com/product/549020/forster-complete-match-headspace-gage-set-223-remington This doesn't need to be done in a receiver. All an upper receiver does is hold the barrel and bolt in alignment. Different manufacturers spec a different fit. Mine was matched by MSTN at 1.4646. If you are going to spend the extra money for a stainless barrel, and you are going to buy a bolt anyway, why wouldn't you want the peice of mind. It isn't a fitting per se, but a matching. You try different bolts until you get the match you want. Its not like a hand fitting that you would do with a 1911. There was a video tour of the Noveske factory somewhere and you could see someone doing this. |
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