How to Identify What Gun You Have

The seven-step identification checklist

Most firearms can be narrowed to the correct maker and model family by following the same sequence. Work from broad clues to narrow ones, and write down exactly what you see.

1. Photograph the gun as found. Take clear pictures before cleaning, polishing, changing grips, removing a scope or taking anything apart.
2. Determine the basic firearm type. Is it a revolver, semi-automatic pistol, bolt-action rifle, lever-action rifle, pump gun, semi-automatic long gun, single shot or break-action shotgun?
3. Record every word and symbol. Copy the maker, model, caliber or gauge, barrel address, patent dates, proof marks, importer marks and any military or police property markings.
4. Record the complete serial number. Include every prefix, suffix, dash, letter and leading zero. Note exactly where the number appears.
5. Measure the visible configuration. Record barrel length, finish, stock or grip material, sight type, magazine style, cylinder capacity and other obvious features.
6. Choose the correct manufacturer or model guide. Do not put a Colt number into a Smith & Wesson table or apply one Browning model's dates to another.
7. Make the clues agree. The date range, markings, frame or receiver, barrel, finish and furniture should make sense together. If they do not, look for replacement parts, refinishing or a mistaken model assumption.

Step 1: identify the kind of firearm

You do not need to know the model to begin. First determine how the firearm holds ammunition and how its action operates. This removes thousands of wrong possibilities at once.

If you know only that the firearm is a handgun, begin with the Handgun Collector Guides. For a known category, browse the main revolver, semi-automatic pistol, rifle or shotgun sections.

Step 2: find the maker, model and other markings

Read the firearm before searching the internet. A clear factory marking is better evidence than a resemblance to a photograph. Use good light and a magnifier, but do not scrape rust, polish the metal or rub chalk into lettering.

Maker, brand and importer are not always the same

A firearm may show several company names. One can be the actual manufacturer, another the distributor, retailer or modern importer. Imported military firearms often carry a conspicuous importer mark added decades after manufacture. That mark is useful history, but it may not identify the original maker.

Caliber or gauge is not the model

“.38 Special,” “.22 LR,” “12 GA” and “.30-30 Win.” describe a cartridge or bore class, not a unique firearm. Many makers chambered many models for the same ammunition. Likewise, a patent date is not necessarily a manufacture date. Treat each marking according to what it actually says.

Nicknames can lead you astray

“Police revolver,” “cowboy gun,” “1911,” “Luger,” “Browning” and “Winchester lever gun” are broad descriptions, not complete identifications. Confirm the exact manufacturer and model before using a serial-number table or estimating value.

Step 3: use the serial number correctly

A serial number may narrow a production year, shipping period or model family, but it rarely tells the whole story. Some manufacturers used separate sequences for different models. Others reused number blocks, added letter prefixes, skipped numbers or shipped firearms out of numerical order. Older records may be incomplete.

• Copy the number exactly, including prefixes, suffixes, dashes and spaces.
• Distinguish the legal serial number from assembly, batch, drawing, patent or catalog numbers.
• Confirm that the number appears in the normal location and style for the model.
• Never alter, deepen, polish, restamp or “improve” a serial number.
• Use a lookup result as an estimate until the physical features and reliable records support it.

Once you know the maker and likely model, use the Firearm Serial Number Lookup Guide to reach the right chart or interactive tool. A factory letter, original invoice, box label or manufacturer archive record carries more weight than an unsourced online list.

Step 4: read proof marks, military marks and import marks

Small symbols can be as important as the large model name. European sporting arms may carry national proof-house marks, date codes and inspection symbols. Military firearms may show arsenal stamps, acceptance marks, unit property marks, rebuild stamps or numbers on multiple parts. A post-1968 import mark on a military surplus firearm may name the importer and country, not the original arsenal.

Do not identify an unfamiliar symbol by shape alone. Photograph it squarely, note its exact location and compare it with a recognized proof-mark reference for the correct country and period. Similar crowns, eagles, letters and numbers can mean different things in different systems.

The serial number tells you where to begin. The whole firearm tells you whether the identification holds together.

Step 5: make the physical features agree

After the likely model and date range are known, examine the configuration. Record the barrel length from the breech face to the muzzle—not merely the exposed portion—only if you know how to measure it safely. Note the finish, grips or stocks, sights, safety controls, magazine or cylinder capacity, buttplate, recoil pad, checkering and any engraving.

Features often changed during a long production run. A model name may span several generations, frame sizes or engineering changes. A serial number that points to one era paired with a barrel, stock or sight introduced much later suggests a replacement part or an incorrect initial assumption.

Signs of refinishing or replacement parts

• Rounded edges, dished screw holes or shallow lettering from buffing
• Finish covering surfaces that were originally left bright or case colored
• Mismatched wear, color or polish between major parts
• Grips, stocks, sights, barrels, cylinders, slides or magazines that do not fit the estimated period
• Numbers on parts that do not match where matching numbers are expected
• Fresh screw damage or tool marks suggesting recent work

These clues do not automatically make a firearm undesirable. They simply change the description from “original configuration” to something more careful. Honest identification comes before valuation.

Photographs that make identification easier

A useful identification set shows the whole firearm and the small clues. Use soft, even light, place the unloaded firearm on a plain surface, keep the camera parallel to the marking, and take more than one exposure when lettering is faint.

1. Full right-side and left-side views
2. Close views of every maker, model, caliber and barrel marking
3. Serial-number location, with the final digits masked in public copies if desired
4. Proof, inspector, arsenal, property and importer marks
5. Front and rear sights, grips or stock, butt or buttplate, muzzle and action
6. Box label, paperwork, holster or accessories that came with the firearm

Do not place a finger or tool inside the trigger guard to hold the gun for a photograph. Avoid photographing live ammunition beside an unfamiliar firearm. If internal markings require disassembly beyond normal safe opening, leave that work to someone qualified for the model.

Choose the right Gun Collectors Club research path

Once the broad type and maker are known, move into the closest collector hub or model guide. These pages combine serial-number context with the visual and mechanical clues that a number alone cannot provide.

Identify first, value second

Do not start with a price guide. A value estimate is only as good as the identification beneath it. The exact model, variation, production period, originality, condition, documentation and current market demand all matter. Two guns that appear similar across a room can fall into very different collector categories after their markings and configuration are examined.

Once the identification is sound, continue to the firearm values guide. If the gun is old, rare, heavily altered, potentially unsafe, or tied to important family history, consider an experienced collector, qualified gunsmith, manufacturer archive or recognized specialist before cleaning, firing, selling or insuring it.