1911 A1 GI Thumb Safety, Blk $59.97 F403650 Colt 1911 A1 Thumb Safety. Black, machined from billet steel, not cast. Some fitting may be required, recommended to be installed by a qualified gunsmith for safety. Only 1 left in stock 1911 A1 GI Thumb Safety, Blk quantity Add to cart Category: Colt 1911 Related products Colt Government Conventional Recoil Spring 12lb. $16.97 Colt 1911 Front White Dot Sight, Series 70 $40.00