Shadow Systems Gen 3, Multi-Optic Complete Slide Assembly, For Glock Gen 3 Compact Frames or Other Compatible Frames, Compatible with Gen 3 Glock Barrel or Shadow Systems MR/XR920 Barrel, Matte Nitride Finish, Black, Will Not Fit Shadow Systems Frames (MR/DR/XR/CR920) SGK-G3S1G19 Gen 3 Compatability Optics Cut Slide Does Not Include Barrel • Finish: Black Nitride • Sights: FS: Green Tritium RS:Black • Overall length: 7.13" • 15in Free-Float MLOK Rail/ Ambi Bolt Release