Ar-47

Armedsask said:
How hard would it be to find just a 7.62x39 mm barrel and bolt?

I want to build a non-restricted rifle that uses AK mags.
Click to expand...
I knew you were going to say dat. I knew it, dammit.
(I was only waiting for the punch-line).





Check (google) del ton. (I posted a broken link in a previous post).
The hardest parts to bring in Canada are the bolt and the mag,
because they say you cannot bring anything 7.62x39 from US.


BUT:
Use the 6.5 Grendell bolt, it's the same ;)
Contrary to what the black rifle guys like to believe,
6.5 Grendell is developed from 7.62x39, not from 5.56NATO :D
(It would be wise to make absolute sure you get
a barrel extension that is guaranteed to work with your bolt).





BUT no.2:
If you change yor mind about AK mags,
then use the AR 6.5 Grendell mag,
because 7.62x39 works very well in it.





But no.3
The barrel? Fcuk the barrel, you do that in here.
If you go 16" (how most of the AR47 have),
then the tap distance is the same as 14" M4
and the diam of the hole is .076" - .084" for DI
(if piston, then I will need details about piston diam,
mass of all the moving parts, etc)


(Yes, I know you want non-res barrel lenght.
When you reach that detail, call me for the tap distance details).



Butt no.4

great_az_218.jpg
 
Armedsask said:
How hard would it be to find just a 7.62x39 mm barrel and bolt?

I want to build a non-restricted rifle that uses AK mags.
Click to expand...

I do know where there is a 7.62x39 AR conversion kit. I believe that it's a complete upper, with BCG and mag/s. Not too much $ either. I'm just looking for the bolt.
 
Last edited:
The 6.5 Grendel is not derived from 7.62x39. It's based upon the 6PPC, and was developed by Bill Alexander and Lapua. You can use a 7.62x39 bolt for 6.5 G. Some manufacturers of 6.5 G ARs use a 7.62x39 bolt. It may not be ideal. The case head diameter is .001 off, and proper 6.5 Grendel bolts are rumored to be stronger. 7.62x39 AR15 bolts have a habit of failing. I am actively searching for one or two right now. They're difficult to find. Del-Ton hasn't had any in stock for months, and won't export anyway.
 
Rotorwing_Savior said:
The 6.5 Grendel is not derived from 7.62x39. It's based upon the 6PPC, and was developed by Bill Alexander and Lapua.
Click to expand...
You looked so convinced of what you say
that you almost convinced me ;)
If you go back to google or wherever you found that info,
maybe you find out what the 6PPC is :)

Rotorwing_Savior said:
You can use a 7.62x39 bolt for 6.5 G. Some manufacturers of 6.5 G ARs use a 7.62x39 bolt. It may not be ideal. The case head diameter is .001 off, and proper 6.5 Grendel bolts are rumored to be stronger. 7.62x39 AR15 bolts have a habit of failing. I am actively searching for one or two right now. They're difficult to find. Del-Ton hasn't had any in stock for months, and won't export anyway.
Click to expand...
It's the SAME bolt, different package.
That said .001" difference in the case head is not to be found on bolts.
I have measured quite a few brands.
 
Dr.Lector said:
You looked so convinced of what you say
that you almost convinced me ;)
If you go back to google or wherever you found that info,
maybe you find out what the 6PPC is :)


It's the SAME bolt, different package.
That said .001" difference in the case head is not to be found on bolts.
I have measured quite a few brands.
Click to expand...

All the information that I have on this subject has come from the internet. I don't claim to be an expert, but I've been trying to learn about this cartridge for some time now. What I'm saying is that I believe there is no parent cartridge. This is not a wildcat, this, at the time of it's development, was a newly designed cartridge that began with the successes of others. That they chose 6.5mm is a no brainer. The bullets available in this diameter seem to outperform all others in a similar category. Since it was developed for the AR15 platform, and using said bullets, the case length, overall cartridge length and capacity were developed until they (Alexander and Lapua's ballisticians) presumably felt they had achieved what they were seeking.
AND, BUTT #4 is BIG, UGLY, and SCARY to me. I think I need an ABx script just for viewing it!
 
Last edited:
You have all my respect for the fact that you look for info.
If, in your efforts, you cover a lot of sources,
then it's even better for you.

If Bill Alexander based his cartrige on the 6PPC, good for him.
If that is the truth,
it would be only normal for you to ask yourself "WTF is 6PPC"?
And if you follow the same general sources of info,
you might be able to find that Pindel and Palmisano (sp)
(the people who developed the 6mm Pindel-Palmisano Cartrige,
after a lot of trials with a lot of cartriges,
decided to expriment with an older design
known in the West as "220 Russian"
(some more or less competitional cartrige/caliber).
They played a lot with the angles, lenghts, dimensions, flash hole,
they switched to a smaller primer, anyway, the works.
After a lot of efforts and trials,
they came up with the 6PPC as we know it,
that dominated many benchrest disciplines for more than a decade.
So, if you dig further for this 220Russian, then,
you'll find out that is nothing else than
a cartrige purely based on ...... surprise, surprise
the ol' 7.62x39, the one designed in a rush
and in the hardship of the ww2
(as an intermediate cartrige between 7.62x25 and 7.62x54R)
with the only general purpose to spray the landscape.
Amazing, huh?

But you may find different stories as well.

If what I posted above is true, I don't know, but
at least the big majority of sources say so
(including ballistic manuals and small arms design manuals
from the most prestigious military universities in the world).

What I do know, is that the 7.62x39 cartrige fits
the 6.5 Grendell bolt and magazine with no problem.
The AR bolts for the 2 cartriges are the same.
After measuring them, you don't know which is which.
It also feeds from the Grendell mag without any hicups.
 
Well, you seem to have a certain level of knowledge on this subject. That's good. It wasn't my intention to get into an argument about this. I was simply posting information that I had come to believe was factually correct. I didn't look past the .220 Russian, it being a .22 cal. I still think that in this day and age, with all the hundreds or thousands of different cartridges that have been developed, that you could create something "new" without taking into account all the science that had been shown before. In the end, it doesn't matter. I'm trying to build a 6.5 Grendel AR15, and I'm having a hell of a time getting it done.
 
It was not an argument, mate,
I deeply regret whatever bad or rude I might said to you
and made you believe that :redface:
I just stated some ideas (not level of knowledge)
based solely on sources open to anybody.
That is how we learn, isn't it?
But please do not believe me and DO your own research.
 
I've seen very good accuracy from lightly modded SKS's with the 7.62x39 (hand loads). How accurate are AR47's? I would assume accuracy potential would be better than than other rifles chambered for this round (except maybe that sweet little CZ 527)...

Also, are they generally reliable?
 
You must log in or register to reply here.
Back
Top Bottom