I'm wanting to swap out the trigger for a drop in - from what I can tell, the MMR tactical uses small .154-inch-diameter pins, can anyone confirm this is accurate?
Colt started using the larger .170 diameter pin holes in their Sporter Match and Match Target commercial lines in the early 90's. All other manufacturers use the mil-spec .155 diameter holes. Even Colt has switched to the smaller mil-spec diameter in recent years...