Don't recommend - Tuff Zone AR-15/M4 Forward Assist Kit w/ Spring & Pin

This Pin is out of spec by a few millimeters. I installed in my second upper and I got it in about 3/4 of the way before it got stuck. I was scared for my upper with the amount of hammering and force it took to free the pin, I had to heat it with a torch before I was finally able to remove it. The first upper wasn't so lucky, I had to replace it because it broke while trying to remove the pin. I was able to save the forward assist from the second and used a luth ar pin on both the second and the replacement without issue.