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Colt 1911 Serial Numbers Lookup3/17/2021
I have wondered about the numbers the are under the slide and grips of many models.For a better experience, please enable JavaScript in your browser before proceeding.One of the most controversial and often misunderstood is the NM prefix on the serial numbers.IMBEL forgings located in Brazil stamp a frame that has more than 50 worth of the work done in Brazil with the a prefix designation of N.
This is often confusing as the GI models are also made in Brazil and the a prefix of WW. Even the mil-spec models produced by Springfield Armory can come with either a N or NM designation but more commonly found is the N. Springfield Armorys Loaded models can come with either the NM or the N designation. Its important to note that the N prefix are imported completed with the exception of the sight, and beavertail grip safety cuts. The finishing touches are actually completed at their main plant in Illinois. The difference with the NM models have majority of internal cuts done, but the rail cuts are performed in the US. Here is a quote from an email exchange with Deb from the Springfield Armory Custom Shop. Colt 1911 S Lookup Series Of PistolsSpringfield uses the prefixes of N and NM to designate 1911-A1 type pistols, just as we used AM as the prefix for the P9 series of pistols. The only pistols which use the national match frames are the complete custom pistols built through our custom shop. These pistols have Springfield Custom etched on the slide, and will have the NM prefix to the serial number. Deb, Custom Shop Coordinator Springfield Custom Springfield Inc. I hope this helps you identify your Springfield Armory pieces. Like many of you, Im a fan of this brand, despite their recent run ins with politics and foot insertions. Colt 1911 S Lookup Free To PostIf you have any other questions related to this please feel free to post them in our Springfield Armory section. Such a build is done by SACS on a National Match frame according to SAs website: ( ). In Debs email she even states: The only pistols which use the national match frames are the complete custom pistols built through our custom shop. These pistols have Springfield Custom etched on the slide, and will have the NMp refix to the serial number. ![]() My SACS Custom Carry with a custom shop certificate dated 82906 carries a NM prefix and is built on a National Match frame. It is nice to note the last three digits of the serial number are hand engraved under the slide, a serial number which starts with NM by the way, as it makes one think the slide and frame are kept together during assembly even on this cheaper model. I assume the stamped number is a manufacturing control number by whoever made the slide.
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