The Umarex / VFC Glock 17 / 18c / 19x / 19 Gen 4 / 45, RWA Agency Arms EXA magazine catch spring is the replacement part for the same one found in the stock gun.
Part number: #03-11 (Glock 17 Gen 3 / Glock 17 Gen 4 / Glock 18c / Glock 19 Gen 4)
Part number: #03-13 (Glock 17 Gen 5 / Glock 19x / Glock 45)
The Umarex / VFC Glock 17 / 18c / 19x / 19 Gen 4 / 45, RWA Agency Arms EXA magazine catch
spring is the replacement part for the same one found in the stock gun.
Part number: #03-11 (Glock 17 Gen 3 / Glock 17 Gen 4 / Glock 18c / Glock 19 Gen 4)
Part number: #03-13 (Glock 17 Gen 5 / Glock 19x / Glock 45)