Accurate Remington 11-48 Serial Number Lookup: The Complete 2026 Collector’s Resource

The Remington Model 11-48 represents a pivotal moment in American firearm engineering, serving as the streamlined successor to the venerable Model 11. As we move through 2026, the secondary market for these semi-automatic shotguns has seen a significant resurgence. Collectors and hunters alike are increasingly seeking to verify the provenance and manufacture date of their firearms for insurance appraisals, Curio and Relic (C&R) compliance, and historical preservation.

Understanding the Remington 11-48 serial number lookup process requires a dual-track approach. Unlike many modern firearms where a single database query provides a definitive manufacturing date, Remington’s mid-century production relies on a combination of receiver serial numbers and barrel date codes. Because barrels are frequently swapped over decades of use, a technical analysis of both components is necessary to ensure the firearm’s authenticity and value in today’s market.

Technical Specifications of the Remington Model 11-48

Produced between 1948 and 1968, the Model 11-48 was the first of Remington’s "New Generation" of shotguns. It utilized a long-recoil action—similar to the Browning-designed Model 11—but featured a revolutionary stamped steel internal component system and a sleek, rounded receiver that would later influence the design of the iconic Model 1100.

In 2026, the 11-48 is prized for its reliability and its availability in multiple gauges, including 12, 16, 20, 28, and .410 bore. Identifying the specific year of manufacture is critical because subtle design changes occurred during the twenty-year production run, particularly regarding the friction piece and recoil spring assemblies, which dictate the types of loads the shotgun can safely cycle.

Locating the Serial Number and Barrel Codes

To begin your lookup, you must distinguish between the legal serial number and the manufacturing date code. These are located in two distinct areas on the firearm.

The Receiver Serial Number

The serial number is stamped into the side of the receiver, typically on the left side near the bottom edge. For the Model 11-48, these numbers often include a letter prefix or suffix that denotes the gauge or specific production series. While the serial number is the permanent legal identifier, Remington’s internal records for this era can be fragmented, making the barrel code the preferred method for dating.

The Barrel Date Code

Remington utilized a two-letter coding system stamped on the left side of the barrel, just forward of the receiver. This system is the "gold standard" for 2026 collectors. The first letter represents the month of manufacture, and the second letter represents the year.

Critical Verification Note

When performing a lookup, always verify if the barrel is original to the receiver. Because the 11-48 allows for easy barrel removal, it is common to find a 1952 receiver paired with a 1960 barrel. In the 2026 vintage arms market, a "matching" date code and serial range significantly increases the specimen’s valuation.

The Remington Date Code Matrix: 1948–1968

The following tables provide the necessary keys to decipher the stamped codes found on your Model 11-48. To use this, locate the two-letter stamp on the left side of the barrel near the breech.

Month Code Key (The "BLACKPOWDERX" Cipher)

Year Code Key for Model 11-48 Production

Gauge Identifiers and Serial Number Suffixes

The Model 11-48 serial numbers often contain a suffix that identifies the gauge of the receiver. In 2026, verifying these suffixes is vital for preventing "parts guns" from being sold as original factory specimens.

• No Suffix or "U": Typically denotes 12 Gauge.
• W: Denotes 16 Gauge.
• X: Denotes 20 Gauge.
• Y: Denotes 28 Gauge.
• Z: Denotes .410 Bore.

If you find a .410 barrel on a receiver with an "X" suffix, the firearm has been modified, which negatively impacts the collector value. Professional appraisals in 2026 strictly penalize gauge mismatches between the receiver serial suffix and the barrel chambering.

Comparing the 11-48 to Other Remington Semi-Autos

Deciding whether to invest in or restore a Model 11-48 requires understanding how it fits into the broader Remington lineage. By 2026 standards, the 11-48 occupies a unique middle ground between the heavy, recoiling Model 11 and the modern, gas-operated Model 1100.

Maintenance and Safety for Vintage 11-48 Shotguns

As these firearms reach 60 to 80 years of age in 2026, safety inspections are mandatory before firing. The long-recoil system relies on a barrel that moves rearward into the receiver upon firing. If the internal components are not maintained, the receiver can suffer from "peening" or cracking.

Expert Maintenance Protocol

Friction Piece Inspection The friction piece and its associated spring are the most critical parts of the 11-48. For 12-gauge models, ensure the friction piece is oriented correctly for the load being used (heavy vs. light). In 2026, many owners replace the original 70-year-old springs with modern equivalents from specialist manufacturers to prevent frame battering.

Recoil Pad Health Original 11-48 buttplates were often hard plastic or early rubber that becomes brittle. If your lookup confirms an early 1950s manufacture, check for "crystallization" of the rubber. Replacing a dry-rotted pad is necessary to prevent shoulder fatigue and potential stock cracking.

Cleaning the Magazine Tube The barrel slides over the magazine tube. This tube must be kept lightly oiled with a high-quality synthetic lubricant. In 2026, we recommend avoiding traditional "WD" style sprays which can gum up over time, opting instead for PTFE-based lubricants that maintain performance in varying temperatures.

Why 2026 Collectors Value the Model 11-48

The Remington 11-48 is often called the "working man’s semi-auto." In 2026, the demand for these shotguns is driven by three main factors:

1. Weight Efficiency: It is significantly lighter than the Model 11 and the 1100, making it a favorite for upland bird hunters who walk several miles a day.
2. Mechanical Simplicity: Unlike gas guns, there are no O-rings to fail or gas ports to clog. A properly timed 11-48 will cycle reliably in extreme conditions.
3. C&R Eligibility: Since all Model 11-48s were produced more than 50 years ago as of 2026, they qualify as Curio and Relics under federal law, facilitating easier transfers for licensed collectors.

Frequently Asked Questions

How do I tell the difference between a Model 11-48 and a Sportsman '48?

The Sportsman '48 is essentially the same firearm but was designed to comply with certain hunting regulations of the era that limited magazine capacity. While the 11-48 typically holds 5 shells, the Sportsman '48 is restricted to 3 shells via a crimped magazine tube. The serial number lookup process remains identical for both models.

Can I use the serial number to find the exact day my shotgun was made?

No, the serial number generally only provides a range. The barrel date code is the only way to narrow the manufacture date down to a specific month and year. Remington's historical ledgers do not typically include day-specific production data for the 11-48 series.

What if my barrel has no date code?

If a barrel lacks the two-letter code on the left side near the receiver, it may be an aftermarket replacement barrel (such as those made by Simmons or Hastings) or a factory replacement barrel produced during a window where coding was inconsistent. In these cases, you must rely on the receiver's serial number range for an approximate date.

Is it safe to shoot steel shot in a 1950s Remington 11-48?

Generally, no. The barrels of the 11-48 were designed before the widespread use of steel shot and are made of softer steel. Using large steel shot through a full-choke vintage barrel can result in "barrel bulging" or "scoring." In 2026, it is recommended to use bismuth or tungsten-polymer loads which are safe for vintage barrels.

My date code is "X R"—what does that mean?

Based on the Remington cipher, "X" stands for December and "R" stands for 1968. This indicates your shotgun was one of the very last Model 11-48s to roll off the assembly line before the model was fully discontinued in favor of the Model 1100.

Expert Insight for 2026 Buyers

When performing a Remington 11-48 serial number lookup in 2026, look specifically for the "28 gauge" and ".410 bore" models. These smaller gauges have seen a 40% increase in market value over the last five years due to their rarity and the growing popularity of sub-gauge sporting clays. Always verify that the serial number suffix ("Y" for 28ga or "Z" for .410) matches the barrel stamping. A "married" set—where the barrel code and serial range both align with the early 1950s—represents the highest tier of investment-grade 11-48 shotguns.

By following this guide, you can confidently identify, date, and value your Remington Model 11-48, ensuring this piece of American firearms history is preserved for future generations.