Rifleman Q&A: Mysterious ‘Trapdoor’

by
posted on April 25, 2023
1870 Springfield Officer’s Model Carbine

Q: I have what I believe to be an 1870 Springfield Officer’s Model Carbine. What I have researched is that these rifles were converted from caplock to a centerfire mechanism, and vernier sights were added. The rifle I have is converted from flintlock using a similar, if not the same, mechanism for firing centerfire cartridges. The only marking is found at the top, rear of the breech and it reads:
“Model 1870.”

I cannot find a single callout in Flayderman’s reference book or the NRA museum website. Is my conversion authentic?


A: You have an interesting piece. “Trapdoor”-style rifles and carbines have regularly been altered to look like flintlock muskets and rifles, blunderbusses and even pistols by the motion picture industry for use as prop guns. These conversions are generally fairly crude (only good enough to look good on camera) and are normally undertaken using later arms chambered in .45-70 Gov’t. in order to take advantage of readily available blanks. 

Your piece, on the other hand, it being a Model 1870, is most probably chambered in .50-70 Gov’t., unless it has been re-chambered. The work appears to be of excellent quality; I have never seen anything quite like it and can only opine that the work was likely undertaken by some gunsmith or talented hobbyist who wanted to fire a “flintlock” without all the attendant bother. The fact that the piece also has an anachronistic, vernier-style rear tang sight indicates that it was intended for shooting rather than just for show.

—Garry James, Field Editor

Latest

OA Defense 2311 pistol left-side view on concrete shown with optic and light attached accessories black gun
OA Defense 2311 pistol left-side view on concrete shown with optic and light attached accessories black gun

Review: OA Defense 2311 Compact

Despite having been made popular by John Moses Browning over 100 years ago, his sacred M1911 design has soldiered on into the modern era, and companies like OA Defense are taking to the classic military platform in all-new ways, improving functionality by nearly tripling the design's capacity with double-stack mags, adding optic-mounting capabilities and more.

New For 2025: POF-USA LMR & P15 BASE Rifles

POF-USA's LMR and P15 BASE rifles are designed to get the company's patented rifle technology into the hands of more users than ever before.

Preview: Athlon Midas TSP1

The unmagnified Midas TSP1 from Athlon Optics features an etched-glass reticle and a nitrogen-purged, one-piece aluminum chassis.

Gun Of The Week: KelTec KSG410

Watch our Gun Of The Week video this week to learn about an American-manufactured bullpup pump-action shotgun in .410 bore made by KelTec CNC Industries of Cocoa, Fla.

The Armed Citizen® Dec. 6, 2024

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

All In The Grip: Angles, Contours & Texturing In Modern Handguns

After thousands of rounds sent downrange, the author has some insights on the nuances of handgun design and marksmanship, and it all revolves around the gun's grip.

Interests



Get the best of American Rifleman delivered to your inbox.