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 Rra Lar 22 Tactical Carbine Web
Gotw Rra Lar 22 Tactical Carbine Web

Gun Of The Week: Rock River Arms LAR-22 Tactical Carbine

This week, we're on the range with the Rock River Arms LAR-22 Tactical Carbine, a rimfire variant of the AR-15 that's designed for reliability and gives enthusiasts a way to shoot affordably.

The Armed Citizen® July 11, 2025

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

Japanese Last-Ditch Small Arms Of World War II

The crude assortment of fighting tools used by the Japanese during World War II give clues of an unprepared and unmatched last-ditch fight that ultimately lead to Allied victory.

Federal Ammunition Awards 2025 Tom Knapp Memorial Scholarships

Federal Ammunition recently awarded the 2025 Tom Knapp Memorial Scholarships to two 4-H shooting sports teen ambassadors.

2025 Optic Of The Year: Burris Eliminator 6

Even as new generation after new generation of Burris Eliminator continued to add more advanced technology and functionality, it remained odd-looking—until the launch of this year’s sixth-generation product, which is the first in the line that can mount atop a rifle using standard 34 mm scope rings.

I Have This Old Gun: Star Model B

Of the many Spanish-made firearms to emerge throughout the 19th and 20th century, one of the most recognizable is the Star Model B, largely due to its similarity to the Colt Model 1911.

Interests



Get the best of American Rifleman delivered to your inbox.