Review on Hillman Group 556 1 Inch 12 Pack: Heavy-duty Hardware Essential for All Your Projects by Tim Larsen

Wrong size for your Armalite. Too long and needs to be shortened. Also, use anti-seize when installing them or you'll never get them out again without piercing them. They were installed on an unfired gun over the course of a day before realizing I needed to remove them and make a modification - during that time due to barrel/pins/sight base material differences they were installed and actually "welded" . .