Well if you are bulding a post sample AMD, I assume you are a licensed class 2 manufacturer building a registered post sample machinegun.
Centerfire systems didn't want to take any chances with the BATFE, so they only included a semi auto trigger group with their parts kits. I don't blame them, especially after this inter-ordnance indictment. You can contact global trades , www.globaltrades.com and get the proper replacement fire control group that you would need for a post sample Machine gun. look for part # p-205.