Zaffiri Precision's single billet 17-4 stainless steel slides are made with tight tolerances that allow an increase in accuracy and performance. 100% American made and manufactured at their facility in Largo, FL. These are among the best aftermarket slides available for Glock. This slide is pre-cut and pre-coated and no changes can be made. Compatible with and designed to fit Glock 43 and Glock 43X frames IMPORTANT - This slide is NOT ported compatible. ZP PORTED barrels are only compatible with the ZPS.P and ZPS.4 slides. No parts will be assembled. Optics Cut (Red Dot Footprint): Zaffiri Precision's Shield RMSc, Holosun 407k / 507k, and Sig Romeo Mfg: Zaffiri Precision