The MSRP for the Korth Ranger is $4,799. KORTH MONGOOSE SILVER. The Silver Mongoose from Korth features all the same features as the standard Nighthawk Mongoose, with an upgraded finish. Standard Mongoose models feature a black DLC finish, while the Silver Mongoose is coated with an equally durable silver DLC finish. $5000 Revolver – Korth Mongoose Silver by ROB GARRETT on JANUARY 23, 2021 Related Tags: Buzz, Feature Articles, Gun Review, Handguns, Korth, Nighthawk, Revolvers The author had an opportunity to evaluate probably the most expensive revolver on the market today. His thought was revealing. Haters are going to hate!.