Norsso P365XL Reptile C Slide Black N365XL-REPCOMP-507K-BLK. 125 in Width: 1 in Height: 1.375 in Fabric/Material: Stainless Steel Features of Norsso P365XL Reptile C Slide Optic mount thread pitch: M4 x 0.7 Cosmetic/Lighting Porting Compensated...