Air Force Ejection seat M4

Discussion in 'Black Rifle Forum' started by Haldor, Feb 20, 2020.

  1. cheygriz

    cheygriz God Bless Trump

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    In what alternate universe would a .300 BO , low velocity pumpkin roller have better terminal ballistics than A 5/56??

    NONE THAT I KNOW OF.
     
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  2. ThomasM4

    ThomasM4

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    Mk262 does pretty good from a mk18.
     
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  3. AK_Stick

    AK_Stick AAAMAD

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    Um. You do realize the 300 BO outperforms 5.56 out of a short barrel right?


    That was kind of the whole drive for the 6.5, 6.8, 300 BO cartridges is they can do something the 5.56 doesn’t do well. Namely offer increased performance in short barrel packages. Especially if you shoot supersonics.

    It’s also quieter.
     
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  4. AK_Stick

    AK_Stick AAAMAD

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    I would have thought getting a small case that could hold both half’s of a MK-18 would have been much easier and cheaper than building an all new QD barrel gun.

    But it is the AF...
     
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  5. NAZG26

    NAZG26 Lost in transit

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    Yeah lets mix some 300blk ammo in the supply chain that can chamber in 5.56 chambers and blow rifles up around a bunch of soldiers and airmen. That is a smart idea. LOL
     
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  6. GP4L

    GP4L

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    Yes, so you are already hunted, and they know roughly where you are... You need an immediate rescue. Not a debate between a borderline novelty load - which subsonic .300BLK arguably are due to their extremely limited practical and realistic uses - and one of the top 5 most common ammunition types on earth.

    That said, I do love my 10" .300BLK. I feed it Barnes 110gr TTx and shoot coyotes with it when I don't feel like using my 18" 5.56 rifle.
     
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  7. Schrag4

    Schrag4

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    If 7.62x39 is so similar, it should be no problem to develop subsonic ammo. I only suggested it because that caliber can be found all over the world (in the mags I suggested, too)
     
  8. GP4L

    GP4L

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    Supers do.. .300 subs do not.
     
  9. Deltic

    Deltic

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    Suppress a short version of this and you use ammo that is in the system.
    [​IMG]
    Or they could update this.:banana:
    [​IMG]
     
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  10. AK_Stick

    AK_Stick AAAMAD

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    If you compare subsonic to subsonic the 300 also delivers better performance as well as being quieter.....


    The only real comparison the 5.56 comes out on top is if you compare supersonic 5.56 to subsonic 300 BO.
     
  11. Deltic

    Deltic

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    They might come down a long way from the seat but the survival kit will be secured to a line attached to the parachute harness.
     
  12. AK_Stick

    AK_Stick AAAMAD

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    Being a downed airman is kind of a novelty situation too.


    And since 300 BO is in the arsenal of SF groups, while it may be a novelty, it is available to people who would need it. Just not for line use.
     
  13. willie_pete

    willie_pete NRA Life Member

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    They do know about building airplanes around guns.


    a10gun.jpg


    :rofl:
     
  14. AK_Stick

    AK_Stick AAAMAD

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    Well Republic did atleast.
     
  15. BOOSTED12A

    BOOSTED12A

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    The survival kit is attached to the pilot. The survival kit is what they are calling the " storage compartment" they are a ton of crap in it. Radio beacon, radio, water, medical supplies, life raft ( depending on location), food and other stuff. Not sure where they are gonna find the room for this in the survival kit. I hated installing a new kit in the seat. They never fit. We used to put about 100lbs of weight on top of em for about 12 hours. We had a spare seat in the shop that we would test fit em in. The lid that closes over the kit was only held on by two 1/8" screws at the hinge and the latch was attached to the fiberglass lid with two 1/16" rivets. If the lid broke we had to pull the whole seat to swap it out. The survival kits had to be inspected/repacked every 6 months. Most of my experience is on the aces ii seat. A10, f15, f16 and f22. The t38 and u2 have similar set ups but on the u2 the kit is a bit bigger and has a hard case and the pilot sits directly on it. Can't remember much about the t38 tho.
     
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  16. willie_pete

    willie_pete NRA Life Member

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    Republic or Fairchild ?



    ;)
     
  17. Haldor

    Haldor Formerly retired EE.

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    Below 2500 FPS the 5.56 is basically equivalent to a solid (not a hollow point) .22 magnum.

    A subsonic 300 BLK is comparable to a .45 ACP (230g bullet traveling at 1000 FPS). Supersonic 300 BLK is comparable to a typical 30-30 or 7.62x39mm load at normal velocity.

    Standard military ball ammo (M193 and M855) both get their primary wounding potential from the fact that when they hit a target above 2700 FPS the bullet tends to come apart creating a cloud of lead fragment traveling through the target. Below 2700 FPS, this fragmentation becomes less likely, below 2500 FPS it basically doesn't happen. I am not making this up.

    http://angry-peasants.blogspot.com/2012/08/effective-range-of-your-223-or-556-rifle.html
    https://en.wikipedia.org/wiki/5.56×45mm_NATO

    This is for .223, but performance of 5.56x45 and .223 are pretty comparable at least from a velocity standpoint.

    http://www.ballisticsbytheinch.com/223rifle.html
     
  18. AK_Stick

    AK_Stick AAAMAD

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    Republic built the first two, Fairchild just copied em.
     
  19. Bomber Nav

    Bomber Nav

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    My issued weapon was a S&W .38 special revolver with a two inch barrel. Come to think of it, we qualified every year with 4 inch specimens from the armory. Hmmm...
     
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  20. pag23

    pag23 NRA Life Member

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    This..right...here..

    No sense to have a different caliber than the rest of the troops
     
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