Anti rotational pins - Elftmann Tactical Anti-Rotational, Anti-Walk Pins

I’m confused with some of the posts. These things work great. I have them on all of my ARs and MPX. The first set was a bit tricky, without instructions. YouTube is loaded with videos. I have a lot more confidence in my triggers, and my lower with these. I shoot a lot, by that enough to replace barrels every year, after 2 years the only time a pin moves is when I take them out. The trigger is held like it’s been welded. Make sure you know if you have large or small pins on your weapon.