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Thread: "FN America Launches New AR-15 Commercial Barrel Line"

  1. #31
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    Quote Originally Posted by Proteus View Post
    what causes a barrel to be over gassed? too big of a port?
    whats the problem with being over gassed?
    accuracy? excessive wear and tear on the bolt or extractor?
    Gas port size.

    However, if you want to really get into it, true bore diameter matters. a 5.56 barrel with a large bore will build up less back pressure than a barrel will a similar size gas port and tighter bore.

    Biggest factor is gas-port size really.

    Specific barrel lengths/gas systems have a range of port size values that should be adhered to avoid under or over gassing the system.
    Last edited by foxtrotx1; 11-05-14 at 20:57.

  2. #32
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    Quote Originally Posted by Proteus View Post
    what causes a barrel to be over gassed? too big of a port?
    whats the problem with being over gassed?
    accuracy? excessive wear and tear on the bolt or extractor?
    If it is over gassed it will wear out faster and have a sharper recoil impulse(I speak from experience in regards to the recoil, though not a lot you can pick up the sharper force). Also, if the barrel starts out over gassed as you shoot it wear will expand the size of the gas port over thousands of rounds that could result in even more issues up to and including the rifle being able to reliably function over the course of its life as the port expands to where it is throwing so much gas the the carrier is out running the ability of the mag to feed rounds.
    Punching paper it isn't an issue, but if you plan on betting your ass and balls on the rifle working when you need it, proper materials and port size makes a lot of difference.
    "I don't collect guns anymore, I stockpile weapons for ****ing war." Chuck P.

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  3. #33
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    ok thanks for all that. im assuming too large a port is what causes over gassing. i imagine there would be a strict formula adhered to with designers/ manufacturers so that there wouldnt be any issues.
    a formula that should be pretty exact regardless of gas system length and barrel length. is there no such magic formula that is an industry standard?

  4. #34
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    "FN America Launches New AR-15 Commercial Barrel Line"

    Quote Originally Posted by Proteus View Post
    ok thanks for all that. im assuming too large a port is what causes over gassing. i imagine there would be a strict formula adhered to with designers/ manufacturers so that there wouldnt be any issues.
    a formula that should be pretty exact regardless of gas system length and barrel length. is there no such magic formula that is an industry standard?
    Not when there's ppl who'll spend 1800 on a correctly made Daniel defense rifle with a proper gas port that'll function amazingly with m855 or m193 but cheap out on their DD or other companies rifle with bad ammo, calling the company mad that their rifles are jamming with Tula or any other under powered ammo. Forcing companies to open up their ports so the rifles stop jamming on those ppl.

    To have a proper gas port the proper ammo is just as important.

    Cheap ammo is the reason for large gas ports.
    Last edited by JulyAZ; 11-05-14 at 21:29.

  5. #35
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    Quote Originally Posted by JulyAZ View Post
    Not when there's ppl who'll spend 1800 on a correctly made Daniel defense rifle with a proper gas port that'll function amazingly with m855 or m193 but cheap out on their DD or other companies rifle with bad ammo, calling the company mad that their rifles are jamming with Tula or any other under powered ammo. Forcing companies to open up their ports so the rifles stop jamming on those ppl.

    To have a proper gas port the proper ammo is just as important.

    Cheap ammo is the reason for large gas ports.
    This is true. I have two BCMs that do not like Tula, will cycle, but not 100%, and often fail to lock back on an empty mag. But with brass cased .223 and 5.56 nary an issue. This is called a clue that it is not the rifle but the ammo that is causing a problem contrary to what some people may tell you. But with the mindset of many that "Good enough" is "Just as good," "and "Just as good" = "It is above milspec" and you run into people having issues. These types are usually the ones you run into at the range, the shooters who buy into the hype, the bullshit, and don't do their research and think .223 ammo and 5.56 Nato are the same loading when they are not. They also think that the Taurus Judge is the end all be all defensive pistol and that you never had to shoot a pistol beyond 7 meters because 80% of shootings occur less and that, and if you can make hits past that you must be special forces or something because that takes skill because their trigger control sucks so bad that they don't shoot groups at 7 meters but shotgun patterns. A little information is a vary dangerous thing, more so when it comes to guns and for those who take things serious the devil truly is in the details, because ignoring those details may result in you meeting the ****er before the other son of a bitch you were intent on sending to meet him yourself.
    "I don't collect guns anymore, I stockpile weapons for ****ing war." Chuck P.

    "Some days you eat the bacon, and other days the bacon eats you." SeriousStudent

    "Don't complain when after killing scores of women and children in a mall, a group of well armed men who train to shoot people like you in the face show up to say hello." WillBrink

  6. #36
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    Quote Originally Posted by levik97 View Post
    Last I knew Noveske got their CHF barrels from PAC-NOR which is a local company to them.

    Levi
    No...

    Noveske gets their stainless blanks from Pac-Nor, and they get their CHF barrels from FN (who manufactures them according to Noveske's specific requirements).

  7. #37
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    so who makes the best AR barrels in the world? FN?

  8. #38
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    Quote Originally Posted by Proteus View Post
    so who makes the best AR barrels in the world? FN?
    Depends on what you are wanting out of the barrel. Accuracy? longevity? Carbine length gas system? Mid length? Horse cock diameter to beat your enemies with once you run out of ammo? Depends on the mission of the rifle. Might be FN, might not be, again depends on what your end goal is as well as to the specs that the barrel is made. Sorry who the less than straight answer but reality there isn't one. Depends on what you define as best.
    "I don't collect guns anymore, I stockpile weapons for ****ing war." Chuck P.

    "Some days you eat the bacon, and other days the bacon eats you." SeriousStudent

    "Don't complain when after killing scores of women and children in a mall, a group of well armed men who train to shoot people like you in the face show up to say hello." WillBrink

  9. #39
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    Quote Originally Posted by TMS951 View Post
    They are already making tons of commercial barrels on this same equipment, no? And they are considered some of the best.

    My understanding is

    Noveske
    Centurion
    Palmetto State Armory
    Spikes
    BCM? (I have never seen who makes BCMs barrels)
    There has never been any confirmation that FN manufactures BCM's BFH line of barrels. A lot of people don't realize that there are manufacturers other than FN and DD who make hammer forged barrels, such as Winchester, Remington, and Ruger.

    I'm sure there are more out there who don't advertise.

  10. #40
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    Quote Originally Posted by Kain View Post
    Depends on what you are wanting out of the barrel. Accuracy? longevity? Carbine length gas system? Mid length? Horse cock diameter to beat your enemies with once you run out of ammo? Depends on the mission of the rifle. Might be FN, might not be, again depends on what your end goal is as well as to the specs that the barrel is made. Sorry who the less than straight answer but reality there isn't one. Depends on what you define as best.
    ok. what barrel/AR type rifle would you want for afghanistan urban warfare that would be considered the best

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