Very reliable so far - ZEV Technologies Z19 Duty Glock 19 9mm Stripped Pistol Slide

I have used 3 of the more popular non-OEM Glock slides on Glock frame pistols so far. With one of the other “big names” I have been 50% successful meaning one of their slides was completely reliable out of the box and the other one ran sometimes.

I currently have 176 rounds through the Zev slide so I am a little shy of my preferred 200 round threshold. To this point I have not cleaned the pistol but I have yet to encounter a malfunction. After the first trip I had concerns with the accuracy I was experiencing but unfortunately I have to admit it was the shooter and not the gun. On the first trip from rest I was getting a little over 3.5” groups from rest at 25 yards with Federal 124 grain JHP ammunition. The next trip out using all the same setup the groups were right at 2.25 inches so it was absolutely me. With that, this setup didn’t care for the Mag Tech steel case ammo (5.5” at 25 yards) but to be fair that ammo falls in my budget practice ammo category. I got slightly better groups with the 115 grain CCI aluminum case ammo but again this is also budget practice ammo. I have yet to try any JHP other than Federal.

I am running this current setup with all Glock OEM parts other than the slide and the sights. Currently I am also using a Holosun 507 and Ameriglo 1 tall black sights which are barely tall enough to clear the deck of the Holosun but are useable should the optic fail. In addition I am using a Steamlight gun light with an IR laser.

While I am not done with my evaluation of my current setup I am pleased with everything thus far. I like the looks of the slide (obviously not extremely important but still a consideration) and to this point the reliability has been 100 % with no malfunctions at all. As I pointed out in the beginning using other brands I have had one instance where two slides by the same manufacturer were on complete opposite sides of the reliability spectrum and note I am using a sample size of one from Zev. With that stated I am pleased thus far and would recommend the slide highly based on my current experience.