Lot 3106

Serial "300000" Colt Frontier Six Shooter Single Action Army

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Serial "300000" Colt Frontier Six Shooter Single Action Army

Estimate: $5,500 - $8,500

Starting Bid: $4,750

(0 Bids)

by Rock Island Auction Company
August 23, 2026 9:00 AM CDT
Live Auction
3600 Harwood Road
Bedford, TX, US 76021

Legendary Milestone Serial Number "300000" Colt First Generation Frontier Six Shooter Single Action Army Revolver with Factory Letter This is a rare offering as the one and only milestone 300,000th Colt Single Action Army revolver that rolled off the production line in late 1907 as a Frontier Six Shooter in .44-40 W.C.F. A period Colt advertisement from 1907 shows an illustration of a Single Action Army revolver and proudly states: "Colt Revolvers/Acceptable for the reason that for over 70 years they have been/The Standard of the Firearms World." The accompanying factory letter lists this revolver as shipped early in the next calendar year on January 18, 1908, to Simmons Hardware Company in St. Louis, Missouri, and confirms its configuration in .44-40 caliber with a 4 3/4 inch barrel, blue finish, and type of grips not listed, as part of ten guns of the same type in the shipment. Colt was known to hold back important serial numbers in production for presentation or archiving purposes but somehow let this one get away and onto the commercial market. The shipment destination, St. Louis, was known as the gateway to the West and this revolver has the appearance of having seen some time on the hip of a traveler or as the working gun of a rancher. Whoever originally purchased the revolver from Simmons Hardware Company was certainly overjoyed when they realized they hit the jackpot with its milestone serial number "300000". The Colt Single Action Army in .44-40 W.C.F. was named the "Frontier Six Shooter" after J.P. Moore's Sons ordered some in 1878, and they were particularly desirable in the American West through the "Wild West" period and into the 20th century due to their ability to be paired with Winchester's lever actions that shared the same caliber. The .44-40 W.C.F. Frontier Six Shooter has found a special place in the hearts of Colt Peacemaker collectors. The top of the barrel is marked with the two-line Colt Hartford address and "COLT FRONTIER SIX SHOOTER" is roll-stamped on the left side. The left of the frame has the two-line patent date markings followed by a circled Rampant Colt logo. The matching visible full serial number "300000" is marked on the frame, trigger guard, and butt, with matching partial "0000" correctly hand etched on the interiors of both grips, unnumbered cylinder, and assembly number "2169" on the loading gate.

Manufacturer: Colt

Model: Single Action Army

BBL: 4 3/4 inch round

Gauge: 44-40 WCF

Finish: blue/casehardened

Grips: hard rubber

Serial Number300000

Class: Curio & Relic Handgun

  • Provenance: The Charles Marx Collection
  • Condition: Good overall with the unmistakable appearance of a trusty western carried sidearm, retains strong original blue finish in protected areas most notably on the barrel beneath the ejector housing, with smooth gray patina and freckling on the balance, light pitting, wear, and legible markings. Mechanically functions. As the milestone serial number "300000" Colt Frontier Six Shooter Single Action Army revolver, this is a must have for a serious American firearms collector!

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Bid Increments
From: To: Increments:
$0 $199 $10
$200 $499 $25
$500 $999 $50
$1,000 $1,999 $100
$2,000 $4,999 $250
$5,000 $9,999 $500
$10,000 $19,999 $1,000
$20,000 $49,999 $2,500
$50,000 $99,999 $5,000
$100,000 $199,999 $10,000
$200,000 + $25,000