Im not too familiar with kel-tec in general but im SURE there is a way to run the serial number to see the date of manufacture google might be your friend here. Just picked up a Kel-Tec KSG shotgun and had some trouble finding the Serial Number.The serial number on. The hardened steel ejector is internal and also holds the engraved serial number. I often practiced with my Kel-Tec at the range using standard Federal American Eagle, but due to the extreme cost, never fired the MagSafe ammo. Serial number/production date for P11 Discussion in 'P-11 & P-40' started by BK_Meyers, Dec 19, 2010. During last summer I bought a Kel-Tec P3AT and some personal defense defender ammo produced by MagSafe. *Also the two least significant places are base 10. To check if your firearm would need to be sent in for barrel replacement, please follow this link: All costs associated with the recall of your firearm shall be. *The KT system doesn't use 'I' and 'O' since they would be confussed with '1' and '0'. P3at 380 kel tec serial number location, trade in value of kel-tec.380, where is serial no kel tec pf9, where is the serial number on a kel tec pf9. You can call keltec and they will tell you what the latest serial numbers are The Kel-Tec serial numbers are a modified 34base.