2 inch barrel on AR-15 SBR

Discussion in 'The Club House' started by primer1, Nov 18, 2020.

  1. primer1

    primer1 Well-Known Member Supporter

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    Why would, but if, when the ...

    I'm at a loss here.
     
  2. Sniper03

    Sniper03 Supporting Member Supporter

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    Primer

    Totally ridiculous! What an idiot and "What Ballistics"!:rolleyes:
    Because the 223/5.56 Round is already over 2.260" in Total Length!
    Ammunition 223 Round Dimension.jpg
    So the Bullet is almost literally sticking out the end of the Barrell!;)

    03
     
    Last edited: Nov 18, 2020
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  3. c3shooter

    c3shooter Administrator Staff Member Admin Moderator Lifetime Supporter

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    Look closely at the video- you can see the tip of the bullet extending beyond the end of the barrel. To what end- I haven't a clue.
     
  4. BullMoose429

    BullMoose429 Well-Known Member Supporter

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    I would have to think that those bullets start tumbling the second they’re fired, and they probably don’t make it more than a dozen or so yards. What I’m really shocked about is that the thing cycles- I can’t imagine there being enough gas pressure to do so.
     
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  5. primer1

    primer1 Well-Known Member Supporter

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    In the comments on the video, one fellow calculated the velocity at 650 fps.

    Or you could grab a handful of gravel from the parking lot and chuck them at the target.
     
    Last edited: Nov 18, 2020
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  6. c3shooter

    c3shooter Administrator Staff Member Admin Moderator Lifetime Supporter

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    Think I have a Wrist Rocket slingshot that with half inch ball bearings, might be faster.
     
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  7. Txhillbilly

    Txhillbilly Well-Known Member

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    I'd be willing to bet that he couldn't hit a 12" steel gong at 25 yards with that thing.
    That barrel is only a case chamber, no rifling to stabilize the bullet at all.
     
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  8. kfox75

    kfox75 Well-Known Member Supporter

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    Why? Because you can.

    Doesn't mean that you should, but you can.
     
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  9. sheriffjohn

    sheriffjohn Well-Known Member Supporter

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    For every pot, there's a lid.
     
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  10. 7point62

    7point62 Lifetime Supporting Member Lifetime Supporter

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    If somebody hasn't done something stupid, somebody will eventually do it.
     
    Last edited: Nov 22, 2020
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  11. kfox75

    kfox75 Well-Known Member Supporter

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    Not in my house. Half of them are MIA, but we have plenty of aluminum foil.
     
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  12. TankTop

    TankTop Well-Known Member Supporter

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    And more accurate
     
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  13. Caveman Jim

    Caveman Jim Well-Known Member

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    cuz they could.... Chitz n Giggles I suppose.:rolleyes:
     
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  14. Sniper03

    Sniper03 Supporting Member Supporter

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    Bull
    I am with you! He had to improvise somethin on the Gas Block. I also can not understand how it is cycling! Because obviously it is a Gas Impingement system.
    :confused: It has me baffled!

    03
     
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  15. BullMoose429

    BullMoose429 Well-Known Member Supporter

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    He obviously figured out some way to do it- I just can’t figure it out
     
  16. CMAB2SA

    CMAB2SA Well-Known Member

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    If he is monetized this video will eventually bring in $$$.
    At the moment though not many subs or views.
     
  17. primer1

    primer1 Well-Known Member Supporter

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    I'm not a gunsmith, but how about a super light spring to make it cycle like a direct blowback?
     
  18. Sniper03

    Sniper03 Supporting Member Supporter

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    Primer
    I have reviewed the Video again and again. And I think you have something there! I would say he has made a special Lighter Buffer, Modified the Spring and may have modified the Bolt? I also noticed an off set in the Low Profile Gas Block on the Rifle. If the Spring, Buffer were modified all the Gas would have to do was unlock the Bolt Lugs from the Barrel Extension Locking Lugs when the round went off. And with a modified system it could almost act like a blow back system at that point to cycle.
    The reason I think your onto something, is by closely viewing the location of the Ejection Pattern when the Casings are Ejected.
    Here is a chart to confirm he has obviously modified the Gas System. You will notice compared to the Chart that the Casings are almost flying back at 5:00 O'clock in the Yellow Section of the Chart. That is not normal at all for the AR-15. IMO he had to modify the system because if he had not the Rifle would not function. With every part being noral it would be short stroking and not running like it is.
    AR 15 Ejection Chart.jpg
    So other than it being a stupid Idea and totally impractical. To each his own!:p

    03
     
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  19. BullMoose429

    BullMoose429 Well-Known Member Supporter

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    Impractical to say the least. Hell- I can’t imagine there even being enough barrel to get any rifling in that thing
     
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  20. kfox75

    kfox75 Well-Known Member Supporter

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    For me, it ranks right up there with putting a small block Chevy V8, backed by a compact power glide, into a motorcycle frame. No practical use, more of a just because you can thing.

    And yes, for the last 25 years, there has been a company making bikes like that. Also with big blocks, and current jokes with LS engines. Another one uses a turbine engine from a helicopter as well.

    If a person can dream it up, someone will make one, and someone else will buy one.
     
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