Quote Originally Posted by 20X11 View Post
Wouldn't you only need to use the distance from the gas port to the end of the barrel in the calculation since the gas system isn't pressurized until the bullet passes that point? Not that it would alter the conclusion of your math, but if we are going to do math...let's be accurate.
Youre right. It is Gas operated.

It will probably take even longer for the bolt to move.