1911 Thumb Safety, Blk $59.97 F500067 Colt 1911 Thumb Safety. Black, machined from billet steel, not cast. Some fitting may be required, recommended to be installed by a qualified gunsmith for safety. Out of stock Category: Colt 1911 Related products Colt Government 1911 Variable Recoil Spring 20lb. $16.97 Colt Government 1911 Conventional Recoil Spring 13lb. $14.97