7.62 upper

[Laces_Out_Marino]

will a 7.62x39 upper go on a 5.56 lower or do you need an AR10 lower?

 

[White]

It will go on any ar15 lower

 

[Cudruln]

What @White said

 

[Red Dawn]

WoW I didn't know that. Hmmm

 

[T-Roy]

Bolt, barrel, and magazine are the only 3 differences

Sent from my SM-G900P using Tapatalk

 

[AirOpsMgr]

Bolt, barrel, and magazine are the only 3 differences

Sent from my SM-G900P using Tapatalk

And firing pin

 

[1776]

Does it use the same bolt carrier?

 

[NWS]

Does it use the same bolt carrier?

Yes

 

[Cudruln]

WoW I didn't know that. Hmmm

Seriously. That's why all my AR 15 builds ended up in x39.

 

[Red Dawn]

Seriously. That's why all my AR 15 builds ended up in x39.

I knew about the 300 BLK but I didn't know about the 762x39. That is good to know it's got me thinking about next build

 

[Laces_Out_Marino]

Is it worth it to put a 762x39 on an AR?

What are the pros and cons?

 

[Red Dawn]

this ^^^
I was just thinking about this. Any issues running steel ammo in these?

 

[AirOpsMgr]

Is it worth it to put a 762x39 on an AR?

What are the pros and cons?

I guess that all depends on your use. Cheap to shoot & larger projectile over 5.56, obviously doesn't have the distance capability of 5.56. Some of the cons are that they are picky about mags and the mags are a little more expensive (ASC mags seem to be the most reliable and worked well for me with no feeding issues, run about $15-17). Some people don't like the shape of the mag....

The bolt lugs have been know to fail due to less material on the lug face to make room for the X39 cartridge, but there may have been improvements since I owned one (never had a bolt fail on me, but didn't run high volume).

They will eat steel case ammo all day long, since the primers are harder on steel case, a standard trigger is recommended

 

[Cudruln]

I love my ar's in x39. They eat anything I feed them. And besides one of my mags I have never had any issues. They are fun to shoot and cheap to supply.