Two Ukrainian-made Snipex Alligator anti-materiel rifles chambered for 14.5×114mm

I think the proper term for these are anti-materiel rifle. Made for stopping vehicles.

I like the plan, and it looks good, but I just feel that dual wielding them may not work.

I think this is how you get Americans back interested in helping Ukraine. Girl with ridiculously big guns.

Are those massive silencers on the end or something else?

Never seen a rifle that large before.

Could also be massive muzzle brakes. That rifle must kick like a horse on five different kinds of steroids.
- A muzzle brake is not a closed cylinder. There would also be no reason to make it that long.
Flash suppressors. Snipers are very high-value targets.
They are suppressors (a.k.a. silencers). They work just like your car's muffler and both were invented by the same guy: the grandson of the inventor of the Maxim machine gun.

It will certainly not make these monster guns movie-quiet but it reduces their massive sound and flash signature making it harder to locate where they were shot from.
- They work just like your car's muffler and both were invented by the same guy: the grandson of the inventor of the Maxim machine gun.
  
  Well that's a cool TIL.
Flash hiders maybe? Idk
Certainly looks that way. As if it wasn't big enough already. In most pictures I have seen they have only muzzle brakes, but in some they clearly have suppressors. A useful side-effect may be to reduce the visible muzzle fire for night operation.
*supressors
- What's the difference?
It's a Supressor
- weight — 6.9 kg
  
  That's quite a suppressor.
  
  Compare to an M4 carbine, the current US issue rifle (not a suppressor on an M4, but the whole weapon):
  
  https://en.wikipedia.org/wiki/M4_carbine
  
  6.43 lb (2.92 kg) empty[4]
  
  7.75 lb (3.52 kg) with 30 rounds and sling

Those things conveniently double as a flag pole at a rural Ford dealership.

For when you need to kill a whole company standing in a line

That thing looks like it can cause some serious damage, even to things that are relatively well hardened.

Like, what would happen if a sniper fired that gun into the barrel of a T-80 that had an HE shell loaded?

Don't have to hit the barrels they usually aim for weak spots hoping for penetration then the round bounces around inside taking everyone out.
- Anti-material rifles were initially designed to take out tanks. However all modern tanks have thick enough armor to deflect its bullets.
  
  Now APC's, trucks, vans, and most engines and electronics are destroyed by these rounds. Hence the anti-material label now.
It would be hard to get the angle just right to get the bullet all the way down the barrel without it impacting the sides of the barrel
- Bullets are deflected along surprisingly sharp bends in a barrel (or any other pipe), so it would be sufficient to hit the tank gun muzzle roughly from the front, and it would probably hit a loaded projectile.
Technically, it would be sufficient of they lodge a bullet into the barrel. As soon as the tank fires, the bullet will wedge between the shell and the barrel, destroying - at least - the barrel.
Kaboom, I believe.
That thing might be able to kill someone just by the bullet passing by them.
- No.