Re: Mega lower builds
I haven't been able to really dial it in yet. It's hovers around 1 moa right now, but should do better. I haven't ever shot any heavier match ammo in it yet. I wouldn't have any concerns with your mega lower. I researched them for a couple months on AR15.com before I bought mine. Everyone had good comments about Mega Machine Shop, and their quality. I also think their deep dark black is nicer looking than a lot of other AR lowers. The upper to lower connection on mine is solid, with zero play. You'll be happy with whatever you decide to put on top of it.