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

Gotw Cz Shadow 2 Carry 1
Gotw Cz Shadow 2 Carry 1

Gun of the Week: CZ Shadow 2 Carry

One of the latest concealed-carry handguns to hit the consumer market is the CZ's Shadow 2 Carry. Watch our "Gun of the Week" episode to see the details of this carry-oriented design.

The Armed Citizen® April 3, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

In Memoriam: Lt. Gen. William Morgan Keys (1937-2026)

Lt. Gen. William M. Keys, a decorated war veteran and former President and CEO of Colt Defense and Colt’s Manufacturing Company, passed away on Jan. 24.

2026 NRA Board Election Results

The National Rifle Association is pleased to announce the results of the 2026 elections for the NRA Board of Directors.

A Celebration of American Freedom: The 155th NRA Annual Meetings & Exhibits

With acres of exhibition space, addresses from NRA’s leadership, an epic country concert and literally tens of thousands of guns on display, the 155th NRA Annual Meetings & Exhibits in Houston­—and our nation’s 250th celebration—are not to be missed.

The "Dreaded Dry-Fire" Training Talk

Talk to the best shooters in the world, and you will hear the same story: the majority of their skill development did not happen on the range with ammunition. It happened with dry-fire practice.

Interests



Get the best of American Rifleman delivered to your inbox.