Disabled1
US Veteran
The 2.0 now has 1/8" solid pins securing the locking block and sear housing. Can these same pins be used in the 1.0 in exchange for the 1.0's roll pins? 

I called S&W this AM and M&P tech dude said the pins and roll pins will not interchange.![]()
shocking...
The S&W customer service people don't know jack about the 2.0's yet. The couple of them that I've talked to (one of them was "tech support") seemed to think that pretty much only the mags are interchangeable but there's actually quite a few things that are. that's not to say that the pins actually are interchangable, because I haven't tried that but what I'm saying is don't just take the word of a customer service rep just because one of them says no.
I didn't talk to a CSR for the answer. A CSR did answer the phone and told me to hold. Then, when a man answered the phone, he answered,"This is technician Scott, how may I help you?" Do you think I was hornswoggled?![]()
The 2.0 now has 1/8" solid pins securing the locking block and sear housing. Can these same pins be used in the 1.0 in exchange for the 1.0's roll pins?![]()
Typically solid pins are tapered, as well as the holes they go into. This is because if the pins and the holes were straight, they would have a tendency to "walk" out of the hole. Straight holes usually specify either a roll pin (like the original M&P's) or a spring pin (like the later 1.0's) because the spring action keeps them in place. Typically taper pins have to be removed from right to left (looking from the rear of the gun) and installed the opposite way. I haven't measured the pins on a 2.0 but I suspect they will be tapered. Whether a spring pin would work, I don't know, but suspect that a properly sized spring pin would compress enough on the small side of the hole to work, but that would have to be confirmed by trial.
The 2.0 now has 1/8" solid pins securing the locking block and sear housing. Can these same pins be used in the 1.0 in exchange for the 1.0's roll pins?![]()
What is the problem you are trying to fix?