Yes. However, a used bolt face should not be used with any barrel other than the one it was originally mated with.
The number of moving parts will vary depending on the make and model of the pinsetter.
All M16s are AR-15s, but not all AR-15s are M16s. Most parts are interchangeable; however, the inside of an M16 lower receiver is milled differently to accommodate the auto sear.
Zero
1
Lots.
i am not 100% but i think 1,000,782 parts that move but i know alot about aircraft's
i believe 27
138
to complicated
The M16 comes in two main parts, the upper and lower receiver. The upper receiver consists of the receiver, carry handle (on older models), bolt group, charging handle, barrel, hand guards, front sight, gas tube, and many other small parts. The lower is composed of the stock (inside it is the buffer spring), pistol grip, fire selector, magazine well. Go to bushmasters website or youtube to see a cutaway M16 in operation for an understanding of how it works.
what is a solid-state media with no moving parts