I agree with Nick. Granted, my builds are only a year or two old, but these parts, pins and springs aren't rocket science and the mil spec LPK's seem to be fine. Midway has an AR Stoner kit without trigger and grip that's pretty inexpensive.
http://www.midwayusa.com/product/862947/...-kit-ar-15
The aftermarket grips beat the heck out of mil spec, in my opinion. If you're not looking for a custom trigger, you can still buy the mil spec. I did the set screw trick on one of mine and ended up with a really nice trigger. That was with trimming one side of the hammer spring to just barely clear the trigger pin. Previous attempts did result in some light primer strikes.
http://www.midwayusa.com/product/862947/...-kit-ar-15
The aftermarket grips beat the heck out of mil spec, in my opinion. If you're not looking for a custom trigger, you can still buy the mil spec. I did the set screw trick on one of mine and ended up with a really nice trigger. That was with trimming one side of the hammer spring to just barely clear the trigger pin. Previous attempts did result in some light primer strikes.