Most Browning Auto-5 serial-number questions start with the same problem: the owner has a number, maybe a letter code, and wants to know what year the gun was made. The trouble is that Browning used different systems across gauges, weights, Belgian FN production, wartime Remington production, and later Japanese Miroku production.
This page is the routing table. Pick the tool that matches the gun in front of you. If you are unsure whether the gun is a Sweet Sixteen, Light Twelve, standard Auto-5, Magnum, Belgian FN, or Japanese Miroku, start with the Belgian Browning Serial Guide.
Browning A5 Serial Lookup
Use this when you have a general Browning A5 or Auto-5 serial-number question and want a quick lookup path.
Belgian Browning Serial Guide
Use this if you are not sure which Auto-5 variant you have. It decodes model letters, Belgian FN eras, Remington wartime codes, and Miroku formats.
Browning Light Twelve Lookup
Use this for Light Twelve guns with L-prefix, G-prefix, single-digit G, or two-digit G serial-number formats.
Browning Sweet Sixteen Lookup
Use this for Sweet Sixteen guns, especially S-prefix serial numbers and later year-code examples such as 6S59455 or 71S5103.
Which Browning Tool Should I Use?
I have a Sweet Sixteen
Use the Sweet Sixteen lookup if the gun is a 16-gauge lightweight Auto-5, especially if the serial contains an S code.
I have a Light Twelve
Use the Light Twelve lookup for lightweight 12-gauge Auto-5s with L or G model codes.
I only know it says Browning Auto-5
Use the general A5 lookup or the Belgian guide first. Confirm gauge, receiver markings, barrel address, and proof marks before relying on a specific chart.
It says Made in Japan
Use the Belgian Browning Serial Guide. Japanese Miroku guns use a different serial-number system and should not be forced into Belgian FN ranges.
Why This Browning Lookup Center Exists
The Browning Auto-5 family is not one simple serial-number chart. A 12-gauge standard gun, a Light Twelve, a Sweet Sixteen, a Magnum, a Remington wartime gun, and a Japanese Miroku shotgun can all send a collector down the wrong path if the model is not identified first.
The cleanest approach is to treat Browning serial numbers as a cluster. The Browning Firearms Hub remains the manufacturer hub. This page is the task hub for people trying to date a shotgun or decode a serial number.
Important Browning Serial-Number Cautions
- Do not use a 12-gauge chart for a Sweet Sixteen.
- Do not use Belgian FN tables for Japanese Miroku guns.
- Model letters such as S, G, M, R, and V matter.
- Physical identification still matters: barrel address, proof marks, receiver markings, barrel ring, and weight can confirm or contradict a quick serial-number read.
- A production year is not always the same as a retail sale date or ship date.
About Greg Cook
Greg Cook writes about firearms collecting, personal history, and the stories behind interesting guns. His Army MOS was 76Y, Unit Armorer, and he brings that practical background to his collector articles.
Sources Consulted
- Browning Auto-5 collector references, including Shirley and Vanderlinden production-era material.
- Browning factory and collector serial-number references.
- Collector observations of Belgian FN Auto-5 markings, barrel addresses, and model-code formats.
- Gun Collectors Club internal Browning Auto-5 reference pages and serial-number guide notes.