Heckler & Koch Serial Number Lookup

Enter a Heckler & Koch serial number to estimate the year it was made — using the manufacturer's chart (February 2025 snapshot) plus four independent published prints of the same alphabet. Heckler & Koch is a date-code maker, not a serial-chart maker: the year of manufacture is stamped as a two-letter code inside the proof marks (A=0 … K=9; J is never a firearm digit), and HK publishes no serial→year chart at all. Enter those two letters — a serial-shaped input is refused with the reason, never guessed.

How dating a Heckler & Koch by serial number works

Most serial charts give one number per year. Heckler & Koch is different, and using the wrong method gives the wrong year — so it is worth knowing what the chart actually asserts.

the two-letter date code — last two digits of the year of manufacture, stamped inside the proof marks

HK's own dating page (the HK-USA FAQ, as archived 2025-02-09 — the live page is offline today, so the manufacturer wording is citable only via the archive) states: “The date code is located on the Left hand side of the pistol and is represented by two letters”, and prints the alphabet A=0 B=1 C=2 D=3 E=4 F=5 G=6 H=7 I=8 K=9. Four independent published charts (1998–2026) print the same alphabet with zero variation. On pistols the pair sits inside the proof suite — serial, then Eagle/N (C.I.P./N from Oct 2014), then the two letters, then the Ulm proof-house marks (hkpro staff post, thread 527792); on MP5-family receivers it is on top, between the proof marks (hkpro thread 586693). Finding the code is the hard part; reading it is trivial.

The pair gives the last two digits of the year of manufacture, and each code resolves to exactly one full year: HK was founded in 1949 (“Since its establishment in 1949…” — heckler-koch.com, re-opened 2026-10-18), so a 19xx reading of digits 00–48 predates the company, and a 20xx reading of 49–99 is a year that has not arrived. The rule reproduces every year the published sources print. Codes reading 1949–1976 carry an era annotation (the letters are documented only from 1977), and codes beyond the current year are printed with the calendar caveat — HK did not stamp the future.

What gets refused, by name: J (on proofed parts a J in the date position flags a repair or modification; on magazines it was the digit 9 — firearm 9 is K, so this tool refuses J instead of reading 9); the 1993–2001 magazine codes (a separate, deviating table — IE on a gun is 1984 but IE on a magazine is 1994, printed as a collision, never averaged); the serial number (the year is not inside it); and HK's earlier numeric month/year form (12/72 = December 1972 — read directly, no decoder needed, refused here as its own named scheme).

Arithmetically possible only — not documented. These 50 codes follow from the alphabet and the 1949 founding bound, but no source prints a year for them, and two of the bands cannot have existed: 1949–1976 predates the letter stamp (HK used the numeric month/year form then; the earliest published letters are HH=1977 and HI=1978), and beyond 2026 is a year HK has not reached. They are shown so the grid is complete, not as answers.

If your model is not listed, the published chart we hold does not cover it — the tool will say so rather than guess.

Questions

Why does my serial number not give a year?

It falls in a gap between the published ranges, or in a model year the chart does not cover — the tool will show the nearest documented range instead of guessing. A public lookup should not invent an answer. For an HK: the code may carry a J — refused, never read as 9 (on proofed parts J flags a repair, on magazines it was the digit 9); the stamp may come off a 1993–2001 magazine — a separate system with its own table, refused with the firearm/magazine collision printed (IE=1984 vs 1994, IK=1989 vs 1996); the serial number itself carries no year; a US-proofed HK (VP series, Oct 2020 onward) may carry no German proof marks at all, and whether its date code survives is NOT ESTABLISHED — a missing code there is a documented normal outcome, not a failed read. None of these is rounded to a neighbouring year.

How accurate is this?

The ranges are reproduced exactly as published in the manufacturer's chart (February 2025 snapshot) plus four independent published prints of the same alphabet. That is not a factory letter — for a definitive date, the factory records are the authority. The alphabet's highest-graded source is the manufacturer's own HK-USA FAQ — citable via its February 2025 archive snapshot because the live page is offline; four independent author charts agree with it letter-for-letter. The code sits inside the proof suite: the sources place the Ulm proof house at the Oberndorf factory, so proof year and manufacture year coincide — and since HK publishes no distinction either way, this tool invents none. The letter era is documented from 1977 on (earliest published examples HH=1977, HI=1978); whether current 2020s production still applies the code is not established, and answers print the year the published chart allows, with that limit stated rather than filled.

Where does the data come from?

the maker's own HK-USA dating FAQ as archived 2025-02-09 (the live page is offline), corroborated by four independent published charts — The alphabet's anchor is the manufacturer's own dating page — citable only via its February 2025 archive snapshot, because the live hk-usa.com FAQ is offline today; the citation therefore says "manufacturer said (as of February 2025), via archive", never "HK says". Four independent collector/author charts (prints between 1998 and 2026) reproduce the same alphabet with zero variation. The founding-year bound (HK established 1949) is the maker's own statement on heckler-koch.com. The 1993–2001 magazine table is author-published (hkpro) and deliberately never merged into the firearm alphabet — the two published tables disagree (IE prints 1984 as a firearm code and 1994 as a magazine code) and the tool prints the disagreement instead of averaging it.

Records & archives

A chart says what the factory serials mean. Our records note for Heckler & Koch says who actually holds the factory records today, whether a letter of authenticity can be ordered, and what it costs and takes — observed, not assumed.

The Heckler & Koch records & archives note →

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