Not fireing

[thurman]

Hope some one can help me. I just built an 80 percent lower. My triger works fine but only fired 5 out of 20 rounds. The rounds that did not go off had lighter primer strikes .the upper works fine on a factory lower. Any ideas on whats wrong?

 

[BLDTYLRY]

Is this a new build? How many rounds fired through it? Is the BCG dripping wet with lube?

Was at the range this weekend and the guy next to me was getting feeding issues and light strikes. Took out the oil bottle and drenched his BCG and everything started working. No more FTF's and no more light strikes.

 

[Gunfighter14e2]

Hammer spring on correctly and not dragging? Hammer springs on top of the trigger pins correctly?

 

[thurman]

I think i figured it out .the hamer on the factory lower goes a touch past 90 degrees . The 80 only goes to 90 . I just shot it with the factory lower and it worked fine