The Condition One Micro Sight Mount allows the user to pair a Red Dot Sight with the C1 J-Arm giving the end user several different micro and macro adjustment points. For Micro adjustment points, the C1 Aimpoint ACRO MSM has 4 different locations for a shooter to choose from on the plate itself (front/mid-front or rear/mid-rear) and for Macro adjustments the C1 Modular Mount has 4 accessory ports left, right, fore and aft. This gives the user of the C1 Aimpoint ACRO MSM 16 total positions to best suit their specific setup or application. Made From 6061-T6 aluminum Type III Hardcoat Anodized. Weight .9oz