ZEV OZ9 RMR Long Slide Black DLC 17-4 Stainless Steel for Glock 19 Gen3 Achieve a total of six unique grip and slide combinations with the O.Z-9C utilizing the two new Conversion Slides and new O.Z-9C X Grip. Add the O.Z-9 PRO Plus Magwell to the mix, and that number increases to twelve possible combinations. This increased modularity of the O.Z-9C platform provides the ability to configure one firearm to match any need without having to purchase additional serialized components.ZEV Conversion Slides are only compatible with OZ9C and Gen3 G19 frames. Due to the difference in locking lugs between compact and full size frames, ZEV Conversion Slides require the use of ZEV Gen5 G17 or G34 Optimized Match Barrels. ZEV recommends the use of our 20lb. compact recoil spring and guide rod with both the 19L and 19XL, however the use of original G19/O.Z-9C guide rod and springs are acceptable.