but they seem to have changed the contents. now they do not include the buffer retaining pin and spring and the trigger guard and roll pin. anyone know when that started? seems odd not to have them in there.
I bought one <3 months ago and it contained ALL of the parts you indicate you are missing. I know that DPMS makes various LPKs with trigger upgrades (and no hammers/triggers), as well as variations, but I've never seen on without the buffer retainer pin and spring.
See here for their description of their basic LPK contents: