No matter how many firing pins, you still have one bolt, one chamber, one barrel. I am not grasping how this would increase rate of fire.
Re: distance gas port is located from bolt- within limits, no real effect on rate of fire- the bolt is moving MUCH more slowly than the bullet.
You might want to take a look at the design of the German MG42- which had a rate of fire of around 1,500 rounds per minute.
Eventually you DO hit an upper limit of possible rate of fire- the bullet MUST leave the barrel before breech unlocks- and there is a finite amount of time where the barrel is occupied by a bullet. If the breech unlocks while bullet is still traveling up the bore, the gas driving it nows comes out of the open breech.
What we have here is... failure- to communicate.
Last edited by c3shooter; 10-15-2011 at 12:39 AM.