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Colt Trooper Mark III, .357 Mag, 6" Barrel, Aluminum Mirror Finish, Very Good Condition !condition Guns International #: 100905919 Seller's Inventory #: Nickel Colt Trooper Category: .327 Federal Magnum - Colt Revolvers - Trooper Seller's Information When emailing or calling sellers direct, please mention that you saw their listing on GunsInternational.com Seller: Clean Member Since: 8/21/17 First Name: Troy Last Name: Garrett State: Virginia Zip: 23113 Country: United States Phone: (804) 317-9380 Number of Active Listings: 0 Seller: Private Seller Return Policy: 3 day inspection and return policy on used guns. Payment Types Accepted: Cash, credit card, check (all must clear before pick up) Description: Colt .357 Trooper Mark III, Nickel Build with 6" barrel a Mirrow Finish Very Good Condition, Red rear sights, Six Shot, Pachmayr Presentation Grips and Original Colt Walnut Grips, Includes Cary Box and Manual MK III 1969 - 1982 In the late 1960s, Colt began to be concerned with a decline in its market share because of price increases brought about by the high labor costs inherent in its manufacturing processes. In response, an entirely new product line of revolvers dubbed the MK III series debuted in 1969. Intended to be the first major advancement of Colt’s designs since the beginning of the 20th century, the MK IIIs used a new ‘J’ frame and had no parts interchangeability with older models. The new revolvers were considered groundbreaking as they were the first modern revolver designs to employ a state of the art transfer-bar lockwork system. This lockwork was not only more sophisticated, but inherently safer due to its superiority to the older hammer-blocking designs; the revolver could fire only if the trigger was deliberately pulled completely to the rear. It also vastly improved on the earlier design in durability, and offered the advantage of employing sintered iron internal parts rather than expensive forged ones. The sintered parts also allowed for improved fabrication tolerances, and could be given a special heat treatment resulting in a harder more wear-resistant composition. Using these parts virtually eliminated hand fitting, significantly lowering labor costs associated with the assembly and manufacture of the MK III line.[2] The springs used in the Mark III internals were also an improvement. Unlike the older flat style, they were coiled and made entirely of corrosion-resistant stainless steel.[4] The MK III series incorporated a number of models, several of which were updates of existing designs. Classic models included the venerable Colt Official Police chambered in .38 Special as the basic/entry-level offering, and the Trooper in .357 Magnum. SOLD Manufacturer: Colt Model: Trooper Mark III Serial Number: J80425X Caliber Info: .357 Chambers: 6 Condition: Very Good Metal Condition: Nickel