Hey.. need some help. Im installing a Spec ops stock on my tactical 870. Ive cleaned the threads with a brass brush, But the pitch on the internal hex screw of the Knoxx stock seems to be coarse thread compared to the reciever nut on my Rem. Has anyone had this problem ? I can start about 3 threads but then it binds up. I dont wanna damage the thread pitch. Do I need more parts ? Thanks




















































