Upgrading Bolt Carrier Group question
When switching froma non shrouded AR-15 carrier, to a proper M-16 bolt carrier do you need to change any other parts? I assume the firing pins are all the same, as well as the hammer in the FCG, is this correct?
The one last thing I need to do to my rifle is get rid of the outdated colt non shrouded AR-15 carrier and upgrade it with a Colt or BCM bolt carrier, I just wanted to make sure it is a drop in job and I don't need to replace the hammer or firing pin.
Thanks in advance.