The model 27 fires a. This kit is compatible with any Glock subcompact frame (models 26, 27, or 33) from gens 2, 3, or 4. Also compatible with polymer 80 or other similar aftermarket frames designed for a subcompact Glock parts kit (Brownell's, shadow systems). Will work on gen 5, except for slide will not lock back on empty mag because slide is not cut for ambidextrous slide release on gen 5s. The item "Glock 26 27 Gen 3 4 OEM Complete Upper Slide Assembly Polymer 80.40 Parts Kit" is in sale since Sunday, February 14, 2021.This item is in the category "Sporting Goods\Hunting\Gun Parts\Pistol". The seller is "thatglockguy" and is located in Broken Arrow, Oklahoma. This item can be shipped to United States.