Ultimate Arms Gear Tactical 45 Degree ACS Around Corner Sight With New Generation Twist Off Weaver Picatinny 7/8" Shotgun Gun Rifle Pistol Mount Unique sight allows the operator to see a target from a covered position - Great for around corners, walls, behind cars . Can be used from either right or left corners & Sight has full 360 degree rotation position movement Magnification 1x , Diameter 30mm - Designed To Work Alongside Any Scope Or Sight Can be quickly removed using the included twist off mount which attaches to any Weaver-Picatinny rail Small, Lightweight, Rugged & Weatherproof . Lifetime Waranty Included