7.62x39 AR: with M4 ramp or not?

[Deus Machina]

I'm generally not an AR guy. In fact, my converted Saiga's like a third arm to me now.

But I'm also a huge tinker, can't make my class homework take up all my day, and don't currently have a project for the lathe and mill.

And I don't need another caliber, or I'd just go and buy something used in .223.

So, my long-term idea is to start buying parts I can't make, and make the parts I can, and start nudging together an AR in x39. But I don't have much AR knowledge, and my Google-fu is suffering from some bad karma tonight.

So, when searching out an upper, are the M4 ramps desirable for the commie caliber, or are they specific for small-bore?

 

[stanger04]

I don't know if this is the answer you want but a standard feed ramp is your best bet as you have material you can shave off as needed.

 

[wally]

My 7.62x39 AR has M4 feed ramps and with the problems it has with JHP ammo I find it hard to believe it'd feed anything without them.

 

[sansone]

I like my x39 AR and since the bullet tip is not in the same spot ramming forward, I think ramps or not you may need some slight dremel work at most. Mine cycles fine with the only changes being a stronger buffer spring to absorb more recoil. The cases would launch into orbit with the standard 5.56 spring. An H2 buffer would be nice too. The x39 AR's are a little hard on the bolt if you don't keep the bolt locked a little longer

 

[desidog]

The M4 ramps work fine on both of mine for everything but the round-nose soft-point Prvi ammo.

More important than the ramp is finding some mags that will work properly; which might be tough right now since C-Products were the only ones i know of, and that company isn't around anymore.