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

Forehand & Wadsworth British Bull-Dog right-side view nickel-plated gun revolver with black grip
Forehand & Wadsworth British Bull-Dog right-side view nickel-plated gun revolver with black grip

I Have This Old Gun: Forehand & Wadsworth British Bull-Dog

Many eagle-eyed NRA members viewing the 1993 Western “Tombstone” no doubt recognized the Forehand & Wadsworth British Bull-Dog so deftly welded by actress Joanna Pacula, portraying Big Nose Kate, during a contemptuous card game between Doc Holliday and Ed Bailey.

Medal Of Honor Marine Receives Henry Repeating Arms Tribute

Henry Repeating Arms presented a Spirit of the Corps 250th Anniversary Tribute Edition rifle to Maj. Gen. Livingston for going above and beyond the call of duty on May 2, 1968, during the Battle of Dai Do in Vietnam.

Preview: Duramag 1911 DS Magazines

Duramag’s 1911 DS Magazines are compatible with numerous 9 mm Luger-chambered 2011-style handguns on the market.

Colt Monitor: The FBI’s “Fighting Rifle”

In the years between the World Wars, a rare variation of the Browning Automatic Rifle proved its reputation as an effective, devastating automatic rifle for combat between the country’s lawmen and its outlaws.

The Armed Citizen® May 19, 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.

Report Shows Inventory, Prices Have Dropped At Firearm Retailers

Nearly all gun and related gear inventories at retailers dropped in the last 12 months. So have most prices paid at the counter, according to the year-over-year comparison detailed in the latest RetailBI report.

Interests



Get the best of American Rifleman delivered to your inbox.