Rifleman Q&A: U.S. 'Trench Gun' Finishes

by
posted on December 9, 2022
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Trench Gun

Q. I’ve been looking to buy an all-original World War II Winchester trench shotgun. I’ve been offered a Parkerized Model 12 stamped “U.S.”, and it has the Ordnance Corps bomb on it. All of the other all-original guns that I have examined were blued. Were any World War II U.S. military shotguns originally Parkerized?


A. With one exception, all shotguns procured by the U.S. military during or prior to World War II were originally blued. The sole exception are some very late production Winchester Model 12 “trench guns” that were factory Parkerized. These can be identified by the serial number (above approximately No. 1,030,000) and the rough, unpolished metal on the receiver. However, the factory Parkerized Model 12 trench guns will evidence some blued parts including pins, screws, triggers and slide-action bars.

closeup shotgun receiver metal finish coloring

While all other World War II-vintage military shotguns were originally blued, the quality of the bluing and metal polishing preparation sometimes showed evidence of hasty wartime manufacture that often resulted in a dull or brushed-blue finish.

Most U.S. military arms, including shotguns, were rebuilt after the war, and this procedure generally required that the formerly blued guns be refinished by Parkerizing. Due to the widespread post-war overhaul programs, the majority of World War II military shotguns observed today are Parkerized, but with the one exception noted above, such guns have been refinished.

—Bruce N. Canfield


This “Questions & Answers” was featured in the February 2007 issue of American Rifleman. At time of publication, "Questions & Answers" was compiled by Staff, Ballistics Editor William C. Davis, Jr., and Contributing Editors: David Andrews, Hugh C. Birnbaum, Bruce N. Canfield, O. Reid Coffield, Charles Q. Cutshaw, Charles M. Fagg, Angus Laidlaw, Evan P. Marshall, Charles E. Petty, Robert B. Pomeranz, O.D., Jon R. Sundra, Jim Supica, A.W.F. Taylerson, John M. Taylor and John W. Treakle.

To subscribe to the magazine, visit the NRA membership page and select American Rifleman as your member magazine.

Latest

Ruger American Gen2 Patrol 1
Ruger American Gen2 Patrol 1

Review: Ruger American Gen II Patrol

Ruger's American rifle line represents a good balance between cost and performance, and the latest generation offers many welcome upgrades, as seen on this Gen II Patrol model in 5.56 NATO.

SOG Knives Celebrates 40 Years in Business

SOG Knives, which was established by Spencer Frazer in 1986, is celebrating its 40th anniversary in 2026.

The History of Repeating Arms Gun-Control Groups Don’t Want the Courts to Know

This episode of NRA’s The Armed Citizen Podcast refutes one of the biggest false claims gun-control groups and the politicians they support repeat ad nauseam by asserting that the Founding Fathers could not have imagined the AR-15.

Rifleman Review: Springfield Armory Kuna

Initially designed by Croatian manufacturer HS Produkt to fulfill a military contract, the Kuna has since arrived on U.S. shores through Springfield Armory as a semi-automatic, large-format handgun chambered for the 9 mm Luger cartridge.

All-American AK: The Bear Creek Arsenal BC-47

North Carolina’s Bear Creek Arsenal makes AR-15s, 10/22s and handguns, but new for 2026, it is introducing its first AK-pattern firearm with the BC-47.

Review: TNW Firearms ASR 1911

Reliable pistol-caliber carbines, especially with quick-caliber-change capability, are fun, and the ASR 1911 from TNW Firearms is one of the most unique of the bunch.

Interests



Get the best of American Rifleman delivered to your inbox.