Are the Glock OEM +2 mag extensions worth using?, would they compromise reliability?.
Early Glock part #1967 (+) bases were more prevalent to releasing, in the early 90's Glock started the baby Glocks and part #7151 (+) bottom with ^ wedge shaped insert.
I use them with my Glock-27 EDC, or Glock-26 Range buddy with no issues.
Anything can and will fail sometimes.
I have never had an issue using them.