I just went to the local pawn shop close to my in laws house in Oklahoma and noticed an AK. It was chambered in 5.56 but had a converted 5.45 magazine. I mentioned this to the fellow behind the counter to which he answered "it does not matter since 5.45 and 5.56 are the same caliber". I politely explained that 5.45x39.5 is not the same as 5.56x45 but he told me he was sure that he was right because the Internet told him so. I figured I must be in some goofy insurance TV ad and left. It is sad that people selling rifles know so little about them.
He also could not understand why the Glock 21 and 37 had different grip profiles since they were both .45's.
He also could not understand why the Glock 21 and 37 had different grip profiles since they were both .45's.