if you have or are buying a Kel-Tec Sub 2000 - read this:   http://www.guns.com/2018/04/09/kel-tec-recalls-some-sub-2000-rifles-due-to-possibility-of-barrel-rupturing/?utm_campaign=trueAnthem%3A+Trending+Content&utm_content=5acc020f04d30173d3119a3b&utm_medium=trueAnthem&utm_source=facebook   Serial Numbers: https://recalls.keltecweapons.com/Kel-Tec_Sub-2000_Recall_Serials.pdf