Rifleman Q&A: Mysterious ‘Trapdoor’

by
posted on April 25, 2023
** 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. **
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

4 Dutch Schwarzlose Tripod WWI
4 Dutch Schwarzlose Tripod WWI

The Overlooked Austrian: The Schwarzlose M1907 Machine Gun

Among the machine guns used by all the powers involved in World War I, the Austrian Schwarzlose is often forgotten. But this simple, reliable arm saw service for more than 20 years across two world wars.

New Hodgdon Reloading Manual, Sierra Bullets Announced

Hodgdon announced the launch of its 2026 reloading manual, while Sierra Bullets launched a collection of heavy-for-caliber bullets for handloaders.

Preview: NRA RFID Bi-Fold CCW Permit Wallet

Show your NRA pride while protecting your valuable financial information with this specially configured wallet from the NRA Store.

I Have This Old Gun: Colt 1860 Army Revolver

For the Union Army during the American Civil War, its officers and cavalry troopers relied on one of Colt's most notable firearms: the 1860 Army revolver.

An Affordable Micro-Compact: The Derya Arms DY9Z

The new Derya Arms DY9Z not only fits into the “micro-compact” class of defensive handguns, it adds another adjective: affordable.

Product: Ruger Red Label III Shotgun

Ruger launches the latest iteration in its traditional Red Label shotgun line.

Interests



Get the best of American Rifleman delivered to your inbox.