Anti-walk pins - Tacfire MAR108 AR15 ANTI-WALK PIN SET

Seems to be well made. Nicely finished. No rough edges or mars in the surface. Fit smoothly on my lower build. Matches well with my extended take down and pivot pins, as well as the mag catch assembly and bolt catch. Looks like everything will produce an excellent finished product. It was very helpful to have the install tools included, if you did not have AR build tools. I am not sure if these are really necessary? In the hundreds of thousands of rounds I've put through various AR's, (many were well worn full-auto military rifles) I've never had a pin walk out of my receiver. They will give you an extra measure of confidence, and if it helps you sleep at night, go for it. I would be more inclined to buy anti-rotation pins for a "select-fire" 16, so that the super valuable lower would suffer less wear and tear. The ONLY reason that I cannot give this 5 stars is that after 2-1/2 months I am still waiting for an upper which was estimated to be shipped 6 weeks ago, and I cannot complete my build and test fire the finished product until I receive the upper.