I made a post in a similar thread discussing these triggers. Unfortunately, while you may not have to remove the bolt release, you do have to dremel out some of the metal housing that surrounds the trigger mechanism. These triggers are great but don't act as drop-ins on the M&P10, which is unfortunate.
Also, I talked to CMC rep locally at the gun shop and if you buy one of the new triggers and it has the c-clips, just call them and explain you just bought this and that you understand the newer versions have the screw ends. They will likely send you a set at no cost. No guarantees though.
Hope this helps.
Mac