Read and watch the following before
The Range Bag - LPK installation
If you don't want to f**k up the finish on the lower get these:
BOLT CATCH ASSEMBLY
- Roll pin punch set
- Blue painters tape
- Utility knife or razor blade
will be where you have the greatest chance to blemish the lower during assembly. Tape it up and swing the hammer gently.
FORWARD PIVOT PIN ASSEMBLY
is where you need the razor blade. Cover with ziploc bag because I'll bet ya you launch the pin and spring at least once.
Oh yea, if you are going to change the charging handle latch be sure to bag that process. The latch spring loves to go flying!