Thanks! Currently on it is the six-position collapsible that comes standard with the M&P10 model 811311. I read that I might also need some kind of buffer tube insert? from S&W and have sent them a message asking about that.What stock is currently on your rifle? I'm assuming you have a collapsible in which case you will need a rifle length extension tube, rifle length buffer, and rifle length buffer spring.
Thanks! Currently on it is the six-position collapsible that comes standard with the M&P10 model 811311. I read that I might also need some kind of buffer tube insert? from S&W and have sent them a message asking about that.