and with google a tap away on your phone, you can see hundreds of thousands of pics of the gun in question to see if its a bbld rcvr or a gun in its military stock. the ' not knowing' is a straw man really.. It more or less means too lazy to do your job. If my job is buying and selling guns.. I should, as a dealer, know a little bit about the hardware I make my livelihood from. I restore antique tractors, have for 20+ years, you don't think I biy them blindly knowing Zippo about the make/model in going after, do ya?