I used to not like the magazine extensions but lately I have tried them and really like them . Here are my Glock 26, 27 and M&P40 Compact with X-Grip extensions. I am very pleased with them. I am hoping that X-Grip will make one for a Glock 30 to accept a G21 magazine. Look at my G26 with the X-Grip that allows it to accept a G19 mag. That is my favorite one ! It is just like holding a G19 !