blank firing adapter question

[brentn]

Seen some videos on youtube in which the maker claims that blanks are being fired, but there is no visible blank firing adapter and you can see smoke exiting the barrel as if it were behind a projectile.

I always thought that it was the pressure behind the projectile that causes the gas to be forced through the gas port in the barrel and operate the action, either direct impingment or through a piston. Without a blank firing adapter, the gases go right out the end of the barrel and there is no pressure to operate the gasses... Or am I wrong here?

 

[Hanzerik]

An AK series rifle?

If so, we had small blank adapters that screwed onto threads on the barrel, not much bigger then the barrel itself.

 

[brentn]

not a varient but cosmetically it looks the same. Its the vz.58

 

[Spiggy]

Counterbored barrel with a ported grubscrew installed. If you can install it deep enough with the properly pressured blank, it'll still cycle and eject fireballs from the muzzle.

Just because you don't see a BFA doesn't mean there it doesn't exist.

 

[CZguy]

What's the link to you tube.

 

[DWARREN123]

I have been know to cut the head off a M-16 round and knock out the fired primer, fitted it to go under the flash suppressor. Works fairly well.

 

[Spiggy]

dangerous too, the head can still fly out from the pressure of the blank.

Movie guns tend to be counterbored, tapped, and have a ported grubscrew installed into the barrel.