Poly Technologies Ultralux 4-Power Scope Integral See-Thru Mount Nickle Black. Installs in minutes by substituting a special dovetail side plate for the factory side plate (no modifications to the gun are required). The scopes have a built-in bullet drop compensator calculated for the trajectory of the M193 ball round and has settings for 1 2 3 4 and 5 yards. The scopes are Nitrogen-filled and are fogproof waterproof and shockproof to give you a lifetime of dependable service. Limited lifetime warranty. Specifications for Poly Technologies Ultralux 4-Power Scope Integral See-Thru Mount Nickle: Manufacturer: Poly Technologies Color: Black Package Contents: Poly Technologies Ultralux 4-Power Scope Integral See-Thru Mount Nickle Poly Technologies 500-023N: Ultralux 4-Power Scope Integral See-Thru Mount Nickle Black