mwezell
Mike Ezell
Mike,
What bolt do you use? Do you change the buffer, spring or anything else? What length barrel you using on the 30M/AR, what bullets?
Adrian
Adrian, I've used different bolts but prefer the Alexander Arms 6.5 Grendel bolt. A 7.62x39 or PPC bolt will work but has a different bolt face depth and is arguably not as strong. Standard AR rifle or carbine buffers work fine. I've built them on 16"- 24" barrels with different gas systems. I've also done them for a wide variety of bullets and have reamers with differing amounts of freebore and neck diameters. I am still trying to determine for myself what the best lightweight bullet is going to be and what powder will be best with them. Lots of variables when it comes to ARs..ie. different bbl length and gas sytems work best with different powders and loads. I shot my 20" lilja barrelled upper with a rifle length gas sytem this weekend with 118 gr. Hillbilly bullets. It shot good when I got enough pressure to it. These ar's don't handle pressure anywhere near our custom bolt guns do though. Suffice it to say that 125 Bergers and h4198 will work well though.--Mike Ezell