First things first-
DO NOT USE VISE GRIPS TO PRESS ANY PINS INTO PLACE NO MATTER WHAT YOUTUBE VIDEOS SHOW
Torque and back off the barrel nut at least twice before final torque and torque it smoothly. You don't need to over torque it.
Make sure the gas tube fits into the upper receiver cleanly. It should float in the hole and fit in the gas key of the BCG with no binding.
Use a long punch to install the mag release pin. Protect the surrounding area with a few layers of masking tape.
Be very careful installing the trigger guard. It's very easy to break off an ear installing the pin. Use a bit of lube and make sure the ear on the opposite side is fully supported. I used a C clamp
A magnet can help with installing detent pins.
I also used an Exacto blade to assist pushing them in place. I worked inside a clear baggie large enough to get my hands in to keep the pin from launching itself into the unknown when I slipped.
Here is a link to the write up I did, with photos, on how to install the trigger
http://m4carbine.net/showthread.php?t=72111
Take your time, don't rush and pay close attention to the details
Bookmarks