Little Ace Derringer

Little Ace

A single action, single shot derringer in .22 short.

Four Aces

What's better than an ace up your sleeve? How about 4.

Pony Express

A six shot, single action revolver in .22LR and .38 special.

Pocket Pony - Mod. 1

A smaller version of the 'Pony Express' revolver chambered in .22LR.

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  • Knives & Accessories

    Other items produced over the years including knives, prototypes, box variations, print ads, etc.

  • Unique Personalizations

    An archive of some of the 'personalizations', modifications and customizations seen in the wild.

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Erl Svendsen


Erl Svendsen was, among other things, a firearms maker from Chicago Illinois. He had multiple shops around the area, including locations in Chicago itself, Norridge, and Itasca, before moving to Brownsville Texas in the Early 1970's.

There he continued producing derringers and the cased sets under the name 'Erl Svendsen Firearm Manufacturing Company', Erl Svendsen Firearms Company (ESFAC) and eventually '4 Ace Mfg. Inc'. No 'Pony Express' revolvers are thought to be produced while operating in Texas however... anything is possible. 


We did a small YouTube presentation about the different models if you'd like to watch it, CLICK HERE

Additionally, Mr. Ed Buffalo has written an excellent article on his website The Unblinking Eye and can be read by CLICKING HERE

Each of these items were made by hand which is why you will see some slight variations in fit and finish. In the photo below you will notice both flat and wire type hammer springs as well as grip and box variations. 

  • Listed below are some of the serial number records available.

  • 'Little Ace' derringer

    Serial Number Range: #15-7632

  • '4 Aces' derringer

    Serial Number Range: #10-4704

  • **We are always looking to trade or purchase any Erl Svendsen related items including; boxes, sales receipts/records, print ads, knives, derringers, etc.** If you have a variation you'd like to submit, email us at or give us a call at (312) 620-9164. Thanks!