I got these 2 Glock barrels from a guy off the ODT and was planning to use them in my G17 Gen 3 project but went another route. There is 2 9mm Glock 17 Gen 3 barrels which should fit Generation 1 - 4 I believe. 1 barrel is a Stainless steel threaded barrel (brand unknown) the 3rd barrel is black threaded barrel with Jarvis 3.55 on barrel which makes it a Jarvis brand barrel. Both barrels are in used condition.