deputy bruce
Member
- Joined
- Mar 25, 2015
- Messages
- 210
has any one had any trouble with the ar upper not working well with the 7.62 x 39 upper if you did what kind of ammo did you use to correct the problem thanks Bruce
I disagree with the above article that the vast majority of people have issues, all gas ports are undersized and split feed ramps won’t work. I’ve had 3 7.62x39 barrels. I’ve used an adjustable gas block all 3 of mine and was able to turn them down significantly so none were undergassed. They all also had split feed ramps which are enlarged slightly with a larger radius. 2 of them came that way and the last one I opened up before installing. All 3 of mine worked 100%. If you have feed problems it’s probably the mags.
My Yankee Hill Machine barrel has ran perfect from day one minus a a couple of feeding issues in the first 10 rounds. No drilling of the gas port and no adjustable gas block, and the feed ramps were already enlarged from the factory. But I don’t buy cheap on barrels and bolts period, economy barrel and bolts never made sense to me.
Depends on what you mean by cheap. MAS is cheap for 7.62x39mm AR parts and they work very well. Built one that ran awesomely using stuff by them.
A few posters on AR15.com speculated that the gas pressure in the long 20 inch barrel dropped quicker than a .223 and thus a rifle length system is undergassed in the 7.62x39 and a carbine or even a mid length would perform better. Have no idea if they knew what they were talking about.Weell, I had a 20 inch that I had to drill out the port TWICE and still it would only cycle Golden Tiger. Made a few calls to the manufacturer about it never could get the "lead technician". He was always "not available right now" or "just stepped out"...yeah right. Never did get satisfaction. Sold it to a guy who cut the barrel off at the port and went SBR. I have heard of others who had gas problems--don't what length gas they had--but problems are out there.
M