If you install all of the M16 full auto parts, but not the sear, the gun can still be made to slam-fire. This is illegal.
There is no reason to install M16 fire control parts in an AR. They are not even as good as a number of upgraded AR fire control parts which can be used to give this rifle an incredible trigger. Basically, spend your efforts building an AR that most military folks would envy rather than making something that is questionably legal, or flat-out illegal.