New build, failure to extract spent shell, charging handle hard to pull back

[Rickc]

Well do a little search on this forum. Failure to extract.

But it is easy to fix. Use an adjustable gas block and open it wide open, lubricate the hell out of the bolt carrier on break in and shoot the hell out of it. I reccomend factory ammo on break in. Eliminates one variable

If you follow most of these threads the gun just magically begins to cycle properly.