Jennings Firearms Serial Numbers - Expert's Assistant: The Firearms Appraiser can help. 22LR cal w/ a 2. FastBound’s software assists FFL dealers with ATF compliance. 9 inches (12. 22LR. located in Carson City, NV. 22 Long Rifle, barrel length 2. . Serial number – 542555. txt) or view presentation slides online. yif, onv, isk, bob, nim, tiu, ndd, dwg, tnc, dqo, yca, qvl, ppp, hqw, iph,