The EA prefix was used for those carbines chambered for 5.7mm Johnson.
The higher serial number quantity may include rejects and those left over and sold to the Jacksonville, AR investors. to date, switched to EF prefixĪTF records indicate 4,524 Enforcers were manufactured/sold between 19. Manufacture, various markings, and s/n's bought from Numrich Gun Parts have been built into carbines by other companies and by owners. Conclusions as to the specific year within the time frame a particular number was manufactured are left for the reader to decide.Ī few receivers with the markings of Iver Johnson over NJ have been observed sporadically among the carbines manufactured in AR by both Iver Johnson Arms and AMAC. The time frame to within a period of 4 years or less. Rather than guess a specific year for a specific serial number the charts below present a serial number range and the years that range started and ended based on the markings and additional resources. (especially in the months prior to a bankruptcy) Since the two letter prefix that starts each serial number was based on the model and various models were manufactured concurrently, each two letter prefix has it's own chart showing that particular prefix's dates of manufacture. What's offered here may change slightly as more information becomes available. Has been an ongoing process for many years.
Collecting and analyzing the serial numbers and their markings Reconstruction of the dates of manufacture has been based on the history of the company, markings on the receivers, the firearm's serial number and the AFMER reports. None of the companies that have used the Iver Johnson name have provided any of the information you see on this entire website, this page included. Is usually the first day it is ready to be sold.
When all of the parts are assembled into a functioning firearm ready to be sold, the date of manufacture of the firearm The phrase "manufactured and disposed of in commerce" infers everything was manufactured and sold within the same calendar year, which is rarely the case in manufacturing.Īll parts of a carbine, and all other firearms, are manufactured separately and completed at different times. Of this report only, "Production" is defined as firearms, including separate frames or receivers, actions or barreled actions, manufactured and disposed of in commerce during the calendar year." This report is called the Annual Firearms Manufacture & Export Report (AFMER). Congress on the number of firearms manufactured by each manufacturer. The ATF Definition used in the AFMER ReportsĪTF files a yearly report to U.S.
Understanding the Meaning of "Date of Manufacture" Post WWII Commercially Manufactured M1 Carbines (U.S.A.)