Poly Technologies Heavy-Duty Sight Installation Kit Black. This is one of the best AK sight adjustment tools on the market. The PolyTech heavy duty sight adjustment tool is carefully machined to tight tolerances for a tool that will last a lifetime and generations to come. This tool will work on both the SKS and AK-47 rifle configurations. All the items listed below are included in the Heavy-Duty Sight Installation Kit. 1-19 PolyTech Heavy-Duty Sight Adjustment Tool 7-1-32 AK-47 Front Sight Post 7-2 Complete Rear Sight Assembly 7--23 Rear Sight Leaf Spring. Buy This Bundle and Save Specifications for Poly Technologies Heavy-Duty Sight Installation Kit: Manufacturer: Poly Technologies Color: Black Package Contents: Poly Technologies Heavy-Duty Sight Installation Kit Poly Technologies 100-019S: Heavy-Duty Sight Installation Kit Black