Question: what are the different generations of glocks?
Answer: The first two introduced were the Glock 17 Gen 4 and Glock 22 Gen 4 in early 2010, followed by the 19, 23, 26, 27 and every other 9mm-frame Glock. The large-frame Glocks, being the 10mm and . 45 ACP pistols, were introduced in Gen 4 livery as of early 2013.