How do we get this guy?

TRich said:
I was talking to a CGNer about this. He said it would be extremely difficult to do because the surplus 7.62x25 is really hot and the gas system wouldn't be able to hold it. If we could figure out a way to do a blow-back action it might be fine. Wouldn't have to change the barrel just get a chamber insert to chamber it down to the cartridge dimensions and switch from a 7.62x39 bolt to a .223 bolt... oh and obviously figure out the mag situation...
Click to expand...

Do you know ANYTHING about firearms ?
 
TRich said:
It's what I was told... Just going off an earlier conversation I had...
Click to expand...

No offense, I just don't get it. The 7.62x39 runs around 51K psi while the 7.62x25 runs around 31K, (from what I can find). So if there's a reason to switch to blow back, I don't think it's because the gas block can't handle the pressure.

Nice piece of work tho, I'd like to see guys out there running them, even if I never get one myself.
 
SoBored said:
No offense, I just don't get it. The 7.62x39 runs around 51K psi while the 7.62x25 runs around 31K, (from what I can find). So if there's a reason to switch to blow back, I don't think it's because the gas block can't handle the pressure.

Nice piece of work tho, I'd like to see guys out there running them, even if I never get one myself.
Click to expand...

No offense taken because I wasn't the one saying it. Someone told me that in a conversation
 
SoBored said:
Then why do you think a gas system that can handle a 7.62x39 can't handle a 7.62x25 I think is what he's getting at.
Click to expand...

That + In what way would a .223 bolt be usefull ??

The bit about the blow back action also has me confused.
 
TRich said:
.223 is close enough in diameter to the 7.62x25 rim. My buddy tried it with his .223 bolt and it fit
Click to expand...

Is that the same buddy who told you that the 7.62 X 25 pressure is too hot to be used in a gun that can handle 7.62 X 39 ?
 
Lobster_pot said:
I'd really like to see it in 7.62x25 :rockOn:
Click to expand...
i_throw_my_money_at_the_screen_by_nunomc-d4mfdfh.png
 
Witchy said:
That + In what way would a .223 bolt be usefull ??
Click to expand...

TRich said:
.223 is close enough in diameter to the 7.62x25 rim. My buddy tried it with his .223 bolt and it fit
Click to expand...

.223 has a 0.378" rim diameter and x25 has a 0.392" rim diameter. Depending on manufacturing tolerances, the 0.014" difference won't be a problem. That means using a .223 bolt would simplify things and avoid having to fart with the x39 bolt to make it work with the smaller x25 round (x39 has a 0.447" rim diameter). It may be possible to run the x39 bolt depending on details and if the extractor will work with the smaller x25 rim, but that would require testing to confirm. It is easier to open the .223 bolt face up than to tweak the x39 bolt face down.


Mark
 
TRich said:
I was talking to a CGNer about this. He said it would be extremely difficult to do because the surplus 7.62x25 is really hot and the gas system wouldn't be able to hold it. If we could figure out a way to do a blow-back action it might be fine. Wouldn't have to change the barrel just get a chamber insert to chamber it down to the cartridge dimensions and switch from a 7.62x39 bolt to a .223 bolt... oh and obviously figure out the mag situation...
Click to expand...

Gas systems can almost always be modified, particularly if the problem is too much gas.

Sometimes it's as simple as a 1/32" drillbit and ten seconds of drilling.

Any manufacturer who can make the firearm in 7.62 x 25 in the first place, can easily match the gas system to the cartridge.
 
You must log in or register to reply here.
Back
Top Bottom