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Thread: 14-16 inch AGB

  1. #11
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    Quote Originally Posted by tlrgsxr View Post
    That’s all great in theory, and you have a lot of them, but there’s no facts there. Maybe you could start by posting the valve sizes for the long barrel AGBs? Or even which HK barrel has a 1.9mm port? Or for that matter, any facts at all??

    I know, you’re always right regardless. You suggested a 1.9mm gas port for a long barrel AGB without even knowing the port sizes, WTF?!?

    Carry on, it’s all yours.
    No OEM barrels have a port size of 1.9mm. IT says that is what works with a 14.5”/16” gas block on a 10.4” barrel.

    He knows because he does it for a living.

    The barrels he's done for me work smooth as butter, with and without suppressor.

    I suggest you go do your own homework, get your hands dirty and post a credible rebuttal if you are so sure that IT is so off the tracks here... .

    PS - I have a buddy who has been flying through bolts on his shorty because he’s shooting suppressed with a non-vented block and cracking the bolt heads.
    Last edited by RegularGuy461969; 08-12-2019 at 12:34 PM.
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  2. #12
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    Sure, some facts:

    IT has no experience with the long barrel AGB. IT shortened a MR and when it wouldn’t run, enlarged the barrel gas port to 1.9mm to get it to run. Not surprising from someone familiar with ARs and not familiar with HKs. Hk does NOT do this, they use the same size barrel gas port and adjust the gas block vent accordingly. If IT was “smaat”, he would have welded the gas block port and drilled it to 1mm. This is what Hk did going from no gas block vent to 1mm on the 10” guns.

    I, on the other hand, do have personal experience with the long barrel AGB. I purchased one, just like anyone can from vendors like Hkspecialist or Hurricane Butterfly. I posted the valve and vent sizes above. From both vendors I mentioned, they’re specifically advertised as long barrel AGBs, they’re NOT for the 10” guns. They’re $299 and in stock at both locations.

    So, IT, who has no experience with the AGB claims that I somehow got a 10” version instead. IT further speculates what valve and port sizes must be on the long barrel AGB by assuming it’s the same as the non-adjustable long barrel gas block. Worse, IT makes barrel gas port size suggestions to others based on this speculation. This is isn’t “smaat”, it’s dumb. I realize IT has a huge superiority complex, chooses the baffle ‘em with bullshit approach, likes to talk down to others, and thinks that his non adjustable gas block is somehow optimized for both suppressed and unsuppressed, which isn’t possible, but making suggestions to others based on his assumptions is not only dumb, it is also irresponsible!

    Is it possible that I somehow got a 10” AGB instead, I suppose, but it certainly doesn’t make any of this any better! In the meantime, I’ll wait for IT to post the valve and vent sizes for the long barrel AGB.

    Why don’t you buy a long barrel AGB like I did and clear all this up for everyone? Hopefully, they won’t send you the 10” by mistake!
    GuntherRommel likes this.

  3. #13
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    Quote Originally Posted by tlrgsxr View Post
    Sure, some facts:

    IT has no experience with the long barrel AGB. IT shortened a MR and when it wouldn’t run, enlarged the barrel gas port to 1.9mm to get it to run. Not surprising from someone familiar with ARs and not familiar with HKs. Hk does NOT do this, they use the same size barrel gas port and adjust the gas block vent accordingly. If IT was “smaat”, he would have welded the gas block port and drilled it to 1mm. This is what Hk did going from no gas block vent to 1mm on the 10” guns.

    I, on the other hand, do have personal experience with the long barrel AGB. I purchased one, just like anyone can from vendors like Hkspecialist or Hurricane Butterfly. I posted the valve and vent sizes above. From both vendors I mentioned, they’re specifically advertised as long barrel AGBs, they’re NOT for the 10” guns. They’re $299 and in stock at both locations.

    So, IT, who has no experience with the AGB claims that I somehow got a 10” version instead. IT further speculates what valve and port sizes must be on the long barrel AGB by assuming it’s the same as the non-adjustable long barrel gas block. Worse, IT makes barrel gas port size suggestions to others based on this speculation. This is isn’t “smaat”, it’s dumb. I realize IT has a huge superiority complex, chooses the baffle ‘em with bullshit approach, likes to talk down to others, and thinks that his non adjustable gas block is somehow optimized for both suppressed and unsuppressed, which isn’t possible, but making suggestions to others based on his assumptions is not only dumb, it is also irresponsible!

    Is it possible that I somehow got a 10” AGB instead, I suppose, but it certainly doesn’t make any of this any better! In the meantime, I’ll wait for IT to post the valve and vent sizes for the long barrel AGB.

    Why don’t you buy a long barrel AGB like I did and clear all this up for everyone? Hopefully, they won’t send you the 10” by mistake!
    Rereading your post, I actually understand what you are saying.

    Would mind posting your measurements again:

    Barrel gas port size
    AGB intake gas port size
    AGB regular gas port sizes

    Thanks and glad I reread it.

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  5. #14
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    Further adding to the confusion, the only photos I've been able to find of AGBs with sling loops is on 10.4 inch barrels.

  6. #15
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    I measured my AGB with pin gauges at 1.6 and 1.4 mm for the valve and 1mm for the vent. I never posted the barrel gas port size, but it’s 1.5mm.

  7. #16
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    Well, now i'm irresponsible and a dumbass. How cute.

    You've clearly convinced yourself of your superiority by measuring out a 10.4 AGB and throwing around the measurements as if it makes you an expert, hilariously so considering your measurements are for a 10.4 AGB.

    Welcome to last year, kiddo.

    Clearly, reading comprehension, critical thinking, and deductive reasoning are not exactly your best characteristics.

    Nobody ever said to open a 14.5/16 to 1.9mm. RIF.

    I'd like for you to produce your "facts" that opening a gas port to 1.9mm on a 10.4 barrel for the use of a 14.5 GB is "irresponsible" and doesn't run both suppressed and unsuppressed. With all of your extensive knowlege, this should be easy.

    You also did not factually nor logically refute my positive/neutral/negative pressure breakdown of the various gas blocks to barrel setups.

    Please explain how HK decided that adding .4mm of positive presure to a 16" barrel that already worked fine, is a good idea. Add to this exactly what the gas port should be on said rifle running an AGB with a 1mm vent and the 1.6mm/1.4mm port restrictions. Since you have all the details, dish the dirt.

    Explain why the AGB measurements you have would coincidentally work perfectly with an upgraded 10.4 barrel (1.6mm port), yet you seem to think it's meant to run on a 14.5/16 system.

    I challenge you to place said AGB on a 14.5/16 barrel and report back your findings on the difference in function/brass throw/bolt speed on the different settings.

    Bonus points if you film yourself shooting it suppressed on both settings as well!

    Given that the point of the AGBs are to run with/without a suppressor, i'd like to know your "expert"opinion on gas port vs. restriction settings vs. vent size interaction and what you think they EXACTLY are for a 14.5/16 barrel? Especially considering that you think your magic AGB is for a long barreled gun.

    Based on your angry, lack of actual facts and data rantings, i'm going to call your "experience" the tip of the dunning-kruger iceberg.
    Last edited by InshallahTech; 08-13-2019 at 09:31 PM.

  8. #17
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    Quote Originally Posted by InshallahTech View Post
    Well, now i'm irresponsible and a dumbass.
    Was that intended to be a question?

    Disregard, doesn’t matter.

    Quote Originally Posted by tlrgsxr View Post
    I know, you’re always right regardless. Carry on, it’s all yours.

  9. #18
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    Can anyone actually say for certain there are different versions of the non-A5 AGBs for different barrel lengths?

  10. #19
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    Quote Originally Posted by illicit View Post
    Can anyone actually say for certain there are different versions of the non-A5 AGBs for different barrel lengths?
    Yes, there are 2 different versions. The one for the 10.4” barrel has a 1mm vent, and the adjustable regulator has a 1.6mm port for unsuppressed shooting and a 1.4mm port for suppressed shooting. The 14.5”/16” barrel version has a 1.5mm vent, and the adjustable regulator has a 1.4mm port for unsuppressed shooting, and a 1.2mm port for suppressed shooting.

  11. #20
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    Aren't the 10” AGBs marked with the single indent on the side and the longer barrel versions smooth? I know zib offers both.

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