Know which diameter pin you need! - KNS Precision AR15/M16 .1555 Diameter Gen 2 MOD 2 Non-Rotate Trigger/Hammer Pins

I had no clue whether .1555 or .154 was what I needed, so I bought .1555 pins. Wrong decision. They would not fit in a new high-end lower, not even close. I was able to put them into a Sig MPX and wow did it tighten up the trigger system. Also, high bolt speed on the MPX eats pedestrian trigger groups, so I was happy when they fit. I ordered .154 pins for the other and all is well. Quality, fit and finish are excellent, everything is good about the product. They are cheap and add life to your lowers.f