Atibal E2 - ACRO Absolute Co-Witness Picatinny Mount Black. Compatible with ACRO style red dots but may be too short in length causing some red dots to over hang. Fits on Picatinny rails. Specifications for Atibal E2 - ACRO Absolute Co-Witness Picatinny Mount: Manufacturer: Atibal Color: Black Finish: Hard Coat Anodized Fabric/Material: Aluminium Fit: Picatinny Rails Co-Witness: Yes Red Dot Sights-Footprint: Aim Point Acro Optic Cut: Not Applicable Length: 1.66 in Width: 1.16 in Height: 1.41 in Weight: 1.4 oz Package Contents: Atibal E2 - ACRO Absolute Co-Witness Picatinny Mount Atibal AT-E2-AC-ABCW: E2 - ACRO Absolute Co-Witness Picatinny Mount Black