Length of bufferedRPC stack

Hello
Is there any restriction of bufferredRPC stack?
For example:
This is switching gun function
[PunRPC]
void SwitchGun(string gunID) {

}

So lets switch gun 1000 times, 1000 calls will be in new player(right?)
New player join the game ang got 1000 calls,
How can I limit the size of stack, or new buffered function call replace previous call