Originally Posted by Shooter89
when i first started the thread i didn't, but i do now.
You'll need a bolt carrier group, and a charging handle.
For the BCG, I recommend a BCM (full auto) BCG. They are very well made. They made be a little hard to find though. Before the panic, they are about $140-$160. Now they are about $180-$200. You MAY be able to find one closer to pre panic prices if you shop around.
In case your wondering why I suggested you get a full auto BCG vs a semi auto, a full auto BCG is heavier than the semi auto BCG. This means it will travel slower, and thus be a little more reliable.
As for the charging handle, I use a BCM gunfighter with a medium latch. A LOT of people swear by them.