I have long been curious about adding a surface treatment to the trigger bar on a Glock. Having come from a racing background, where we often looked for any possible way to reduce friction. Many times, things like bearings and gears would be sent off for various friction reducing compounds to gain any and every edge possible.
AR rifles often see their bolt carrier groups coated in similar compounds and we all love a tIN treated Glock barrel, but how much of a difference would be seen in the Glock trigger bar?
Recently, I had been given a Glockstore tIN coated trigger bar from my good friend and trigger aficionado, Ron. I had an Overwatch NP3/Robar treated trigger bar from another project. These two anti-friction platings are both quite popular in firearms and have a coefficient of friction that are quite similar. (NP3 0.07-0.1/ tIN 0.05-0.90) They are slicker than that of Nitride and Nickel Boron treatments. I was quite interested to put these two trigger bars to the test, comparing them to a fresh factory trigger bar, and one of my own polished and tuned bars.
The test frame is a Glock 26L as used in the connector testing, however, the slide had been changed to one with a 4.5lb striker spring. Each trigger bar was given a factory shoe, and the connector used was a highly polished ‘.’ connector. No oil was put on the trigger assembly for lubrication. A Wheeler Engineering digital pull gauge was used and each setup was tested 6 times in a row and the numbers averaged.
Factory 3rd gen- This trigger assembly broke at #3.8lbs There was no surprises here. Stainless steel has a coefficient of friction of 0.5-0.8 (Look at the decimal points of the treatments.) With oil, this figure goes into the 0.16-0.25 range
Overwatch NP3 3rd gen- This trigger bar is factory except for the Nickel/Teflon (NP3) coating. Having already removed the trigger shoe for another project, I installed a factory shoe on it and dropped it in the 26. Out of the two treated bars, I had the most hope for it because of research I had done on this matter. NP3 is what I had my eye on for my next AR BCG. In the Glock, this trigger bar broke at #3.3lbs
Glockstore tIN 3rd gen- While this is said to be titanium nitride coated, I wonder if this has been subjected to a spray tan like Lenny? Food for thought, but it is definitely that flashy gold that we all love when contrasted with the tactical Tupperware that is a Glock. Titanium Nitride coating is well known for being used on drill bits to help give them a little extra durability and has a friction reducing trait. This trigger bar had a profiled safety plunger tab. The trigger bar broke at #3.6lbs
TacticalPontoon polished 3rd gen- This trigger bar is my own standard unit that is highly polished with a profiled safety plunger tab and broke at #3.7lbs
These results are not exactly what I had expected. The NP3 coating won this round, but not by much. I will go back and add a lubricant to each bar to see how this changes the characteristics. More to come.