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  • Blog

    The Wagon Box Fight and The Springfield Armory M1866 – Second Allin Conversion (Part 1/2)

    January 25, 2022 /

    One of my favorite periods of study of American history and the military arms is the time between the end of the Civil War in 1865 and the Custer battle of 1876.  I have been fortunate to have walked the battlefields of Northwest Wyoming in the area of the Powder River, Fort Phil Kearney and the Little Big Horn battlefield in Montana.  A fascinating aspect of this period is that it was a time of great and rapid change in the transition from muzzle loading arms to repeating arms and from percussion to centerfire metallic cartridges. A great deal of activity centered around Fort Phil Kearny, which was established in…

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    Sample of United States Rifle Model of 1917

    May 17, 2023

    Honoring Revolutionary War Veteran John McIlduff: A Family Legacy Remembered

    July 1, 2026

    What were the origins of the Garand? “Our New Service Rifle (1938)”

    August 3, 2022
  • Blog,  M1 Garand

    The “Gas Trap” Garand

    January 3, 2022 /

    Newer M1 Garand rifle collectors may not be aware that the U.S. Rifle, Cal. .30 M1 with which we are all familiar featured a very different type of gas system when it was adopted in 1936.  The collector term standardized by the Garand Collectors Association (GCA) in 1993 for the first type of gas system was Gas Trap that utilized a false muzzle to deflect or “trap” the gas into the gas cylinder.  The early barrel was threaded at the muzzle and the gas cylinder screwed onto it.  The gas plug slipped down into the front of the cylinder and was held in place by a screw.  The barrel had…

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    Ruger 10/22 – Ch. 10: ALMOST 10/22s

    May 15, 2024

    Honoring Revolutionary War Veteran John McIlduff: A Family Legacy Remembered

    July 1, 2026

    Rock Island Rifle Model 1903 – Table of Contents

    March 15, 2023
  • AR-15,  Blog

    BOOK REVIEW: A Collectors Guide to the Colt AR-15 SP1 Sporter Rifle

    December 8, 2021 /

    I have long been a fan of the Colt AR-15 SP1 Sporter Rifle.  When I bought my Colt SP1 in 1982 you had two choices in the purchase of the AR-15, a Colt SP1 Sporter rifle or a Colt SP1 Sporter Carbine.  That was it as there were no other makers.  I chose the rifle.  The price was $500.  I shot my SP1 a lot back in the day and used that rifle to compete in early IPSC 3-gun matches.  It remains one of my favorite rifles; it is accurate, light weight, and easy to shoot. One of my gun regrets is that I didn’t buy a Colt SP1 Sporter…

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    My Latest AR-15 (Part 3/3)

    March 13, 2022

    My First AR-15

    February 21, 2022

    My First AR-15 (Part 2/3)

    March 25, 2022
  • Blog,  US Infantry Weapons

    My Favorite World War I U.S. Small Arms – 1917 Rifle (Part 3/3)

    November 16, 2021 /

    This blog post is the last of three about my favorite World War I U.S small arms.  When America entered World War I in April 1917 it was ill prepared in arms and equipment with which to fight in a world war.  As it took many months for US troops to train and travel to Europe and to enter combat, weapons manufactured in 1918 have been the focus of my collecting. Surprising to some, the M1903 rifle was not the predominant rifle carried by U.S. troops in World War I.  That rifle actually was the United States Rifle Model of 1917, often erroneously referred to as the M1917 Enfield or…

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    A 4th of July Tribute (Part 1/2)

    June 30, 2026

    The Story behind “The M1911 Complete Assembly Guide”

    January 8, 2021

    The Mysterious Case of the Pachmayr & the Tussey

    July 29, 2024
  • Blog,  US Infantry Weapons

    My Favorite World War I U.S. Small Arms – 1903 Rifle (Part 2/3)

    November 16, 2021 /

    This blog post is the second of three about my favorite World War I U.S small arms.  America declared war on Germany on April 6, 1917.  It took many months for US troops to reach Europe and to enter combat.  The primary period of time for Americans in combat in World War I was in 1918, therefore weapons manufactured in 1918 have been the focus of my collecting. From adoption in 1903 through early 1917, Springfield Armory was the only continuous maker of the M1903.  Rock Island Arsenal had also manufactured M1903 rifles, but only from 1904 through 1913.  Production at Springfield Army was at only a moderate rate.  By…

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    Ruger 10/22 – Ch. 1 History – Intro

    November 8, 2023

    WJK 1911

    August 21, 2024

    The M1911 Complete Assembly Guide – Table of Contents

    July 6, 2023
  • Blog

    My Favorite World War I U.S. Small Arms – M1911 Pistol (Part 1/3)

    November 4, 2021 /

    This post is the first of three about my favorite World War I U.S arms.  My first collectible US martial arm purchase in the early 1980s was a Colt M1911 pistol manufactured in 1918.  It had been carried by a friend’s grandfather during World War I.  Sadly I had to sell that one to help pay for a divorce. I wish I had it back. The War to End all Wars (World War I) began in Europe in 1914.  America remained neutral until April 6, 1917 when we declared war on Germany.  It took many months for US troops to reach Europe and to enter combat. Because 1918 was the…

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    My Favorite World War I U.S. Small Arms – 1903 Rifle (Part 2/3)

    November 16, 2021

    M1911 Springfield Armory, 1914 Production

    February 9, 2023

    The M1 Garand: America’s Semiautomatic Legacy

    June 3, 2025
  • Thursday Day at the Range

    Smith & Wesson Model 10 Heavy Barrel

    November 4, 2021 /

    This week’s Thursday day at the Range included a double action revisit of a true classic: a Smith & Wesson Model 10 Heavy Barrel. Pretty ordinary, you’d say; pretty common, you’d say. Ah, but you might not think so if you noticed the cartouche that’s partially covered by the grip: CPD in a circle. “CPD” refers to “Cleveland Police Department, of Cleveland, Ohio. The third picture shows what I call the “library card,” the property record for this revolver. When the CPD began to rearm with semiautomatic pistols, Officer James Scully purchased the revolver in 1982. The revolver was fitted with Mershon grips during its service with the CPD. Mershon…

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    Ruger BSR9

    October 4, 2021

    Double Action Revolver

    November 4, 2021

    .30 Luger Ruger P89

    October 4, 2021
  • Thursday Day at the Range

    Double Action Revolver

    November 4, 2021 /

    This Thursday Day at the Range continues our double action revolver action, this time with a pre-WWII square-butt S&W Military and Police, fourth change. With a serial number in the 550,000 range. it likely dates to the late ’20s or early ’30s. This is one of those guns that has seen a lot of outside wear and abuse, but hasn’t been shot very much. The action is as smooth as silk, just as would be expected from a classic “Model 10.” The counterpoint to that sweet trigger is, of course, the vestigial sights. It should be no surprise that I’m a dyed-in-the-wool 1911 guy; but classic Smiths, particularly K frames,…

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    Ruger BSR9

    October 4, 2021

    Ruger Super GP100

    November 4, 2021

    Smith & Wesson Model 10 Heavy Barrel

    November 4, 2021
  • Ruger,  Thursday Day at the Range

    Ruger Super GP100

    November 4, 2021 /

    This time Thursday Day at the Range continues the double-action revolver series with more DA action. My focus for over six decades has been single action automatic pistols, specifically M1911s. Oh, sure, I dabbled in single-action revolvers such as the Ruger Single-Six, and at one point had an S&W Model 38 and a Walther P38. But, I didn’t shoot them much. This series of Thursday Days is intended to remedy my double-action deficiency. Last time we ran a Ruger Wiley Clapp GP100 with a 3″ barrel. This time, it’s another Ruger, a Super GP100. The Super GP is essentially a Super Redhawk with an eight-shot .357 Magnum cylinder and a…

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    Ruger 10/22 – Ch. 9: SELECTING ENHANCEMENTS

    May 15, 2024

    Three Icons of American Firepower

    March 10, 2026

    10/22 Deja Vu

    March 25, 2021
  • Ruger,  Thursday Day at the Range

    Ruger GP100

    November 4, 2021 /

    This Thursday Day at the Range included the first revolver we’ve run in some time. We’ve had a long string of autopistols, thus I think it’s time to switch things up with a little wheel-gun action. This week’s subject is a Wiley Clapp special edition 3″ Ruger GP100. The GP100 is Ruger’s heavy-duty medium frame .357 Magnum revolver. It replaced the much-loved Security-Six in much the way that S&W supplanted their K-Frames with the slightly stronger L-Frames. Wiley Clapp, a long-respected handgunner, has been retained as a consultant by Ruger (and Colt) to recommend product enhancements. In the case of the GP100, a fiber optic front sight and Novak-style rear…

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    Ruger 10/22 – Ch. 4 Assembly – Intro

    February 9, 2024

    The Ruger 10/22 Complete Owner’s and Assembly Guide

    October 31, 2024

    Why the Ruger 10/22 Refuses to Fade Away

    January 19, 2026
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Scott A. Duff Publications sells gun safety manuals, assembly guides, and historical weapons books.

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