Underwater assault Rifle

Cpt.ZR SG

yea glock, MP5 can be fired underwater…

sand king SG

Yupps, can fire but not 100% lethal.

dark_snowboy SG

those are navy seals, they are supposed to "not" meet any enemies underwater Surprised

Shotgun SG

Agreed.... divers generally don't meet enemy divers under water.... U don't send divers to patrol the shoreline to fend off enemy divers... thats like.. err.. nvm.

I love the part where they just crouch below the water level, with their weapons ready. Then when the tide recedes, just a portion of them and their weapons can be seen, while they visually scan the shore.

Apparently, the divers tell me they are practically invisible from the enemy when they do that.

moca SG

hehe, I think they are wrong on that, too...

There is a definite blowback impact upon the firing of most firearms.

There is a strong recoil when you fire a weapon, part of it absorbed by the recoil spring and the other absorbed by your body poised for the recoil action.

However, it is true that Hollywood over-dramatise the being-hit-reaction, no doubt. And bullets passes through most things without any impact force unless they meet something they cannot penetrate.

When we did butt party in the old days, we could barely feel the 5.56 bullets passing through the plywood targets.

The most dramatic photo of a guy being hit was that of a rifleman in the Spanish Civil War. He neither flew forward nor backward. But the impact of the bullet caused him to throw out his arms and fling off his rifle as his knees buckle under him.

geodome SG

I think that is the result of pain

Moonstriker SG

yea.. pain n v normal human nervous reaction..

can test at home if u want...

hold a glass of water...
then ur sis/mum/gf/wife/whoever.... pokes ur butt or something with a needle/sharp knife.
most of the time.. u'll drop the glass/almost drop it..
u must not anticipate the poking tho... Laughing

Moonstriker SG

ooops double post...~ Mr. Green

glock SG

When hit by a bullet or two , the unfortunate casualty just drops like a ton of bricks. Hollywood dramatizes it. The momentum of a 5.56 or 7.62 bullet is insufficient to throw a person a couple of meters when hit. Otherwise, it will do the same to the firer – remember your old school chum Newton ? – for every action, there is an equal & opposite reaction.

moca SG

There IS an opposite reaction when you fire a weapon, but the recoil spring absorbs most of it.

Still, some is transferred to your body which is why you must adopt a proper stance especially with the more powerful weapons.

moca SG

Originally posted by geodome:

I think that is the result of [b]pain[/b]

George Orwell was shot in this same conflict (Spanish Civil War), and I think he described it in his book 'Homage to Catalonia' or something.

Can anyone recall his description?

I think he said that at first he didn't know he was shot - cos he had never been shot before. He didn't feel pain at first but felt like he was whacked from behind and he fell down.

Of course, different folks, different strokes.

Raptor937 SG

So you mean that if I were to fire any weapon that doesn't have a recoil spring I would fly backwards 6 feet. Laughing

Unless the design of firearms have changed overnight, I'm certain that the bolt action rifles, revolvers, lever action rifles, pump action shotguns etc. that I've used don't have recoil springs.

That would mean I was at risk of breaking/dislocating my arm everytime I pulled the trigger on those weapons. Rolling Eyes

Shotgun SG

I think there's more physics to it than described. I'm no physicist, but this is what i figured. The instant u pull the trigger, the percussion cap is struck and the explosive force drives the round out the barrel. That instantaneous pop is what begins the recoil action. The pressure will try to escape from the point of weakest resistance, so the "recoiling" feeling we feel is the pressure, pushing the bullet out of the barrel. That recoil dies immediately as soon as the bullet exits the barrel cos the pressure is then escaping already.

the recoil dampner thing in the butt-spring in the M-16 is there to absorb the initial shock and push for every round fired. Otherwise, it would be abit to fire the weapon rapidly if it was gonna disrupt the firer with recoil every single shot.

I think the newer sniper rifles such as the PSG-1 or Hecates have recoil-dampner things as well.

ferryman2393 SG

which fire 5.66 mm needle-like projectiles 120 mm long

haiya...the gun fires needle-like projectiles. not the normal 5.56mm FMJ. why want to talk about 9mm vs 5.56mm performance underwater?

there's another gun from the russians that looked like a revolver but fires similar projectiles shown above.

Shotgun SG

Oh yeah... I saw something like that b4. 4 barrels, with one round loaded each. Effective distance about 11-17 meters nia.

moca SG

Please show the part where I said '6 feet'.

Otherwise you've just based your whole senseless post on something I never said.

If you insist there is no recoil when discharging a firearm, you've probably never fired one before and you are talking rubbish.

Just because recoil doesn't knock firers back '6 feet' doesn't mean there's no recoil.

nismoS132 SG

no one was ever arguing that weapons have no recoil. what they were saying is that you don’t get thrown back when you’re shot. even when you watch the gulf war 2 videos of the iraqis being shot by m16s, they don’t get thrown back, they just simply drop dead. only time they get thrown back, is when they’re shot at by apaches, which is simply overkill, because they’re are thrown back, they’re blown apart.

Shotgun SG

5.56 FMJ rounds shouldn't throw you back if it doesn't hit something bullet resistant. All the kinetic energy is use to penetrate rather than to "knock back." Only when the bullet fails to penetrate, then u'll feel the punch.

If i'm not wrong, a person would get thrown back a little bit if he kena a JHP round instead.

Raptor937 SG

I never said there was no recoil, I said Newton's law applied.

"For every action there would be an opposite and equal reaction."

You said

There IS an opposite reaction when you fire a weapon, but the recoil spring absorbs most of it.

Then I pointed out that

I'm certain that the bolt action rifles, revolvers, lever action rifles, pump action shotguns etc. that I've used don't have recoil springs.

I get the full impact of the recoil and if I didn't dislocate my shoulder or fly backwards, there is no way the target would.

My point is that the results of their tests were valid.

There is NO way a person would be thrown backwards when shot.

Meia Gisborn SG

Not quite true.

When the powder in the chambered cartridge is ignited, the expanding gases push equally in all directions. The projectile is pushed into the rifling and begins its journey down the barrel bore. At this point, the expanding gases are pushing equally against the breechface and the base of the advancing projectile (which is still physically in contact with the barrel). Both forces cancel each other out and the firearm remains immobile.

Thus, there is no felt recoil as the projectile is being propelled down the barrel. Recoil only begins at the point the projectile exits the barrel. When the projectile leaves the barrel, two things happen:

1. The projectile no longer exerts a forward drag on the barrel to counter the force of the gases pushing back against the breechface, and

2. The expanding gases are vented forcefully out the front of the barrel.

On a semi-auto pistol, the entire slide now starts moving rearward against the pressure of the recoil spring to begin the recoil cycle. The spent case is extracted from the chamber, hits the ejector and is thrown clear; the slide hits the rear stop in the frame and the compressed recoil spring expands to push the slide forward into battery, stripping the topmost cartridge from the magazine and chambering it in the process. This completes the recoil cycle and the pistol is once again ready to be fired.

There is some high-speed footage shot by a German researcher illustrating what I've written above. I'll try to locate and post a link to it later today.

MG

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